Solving a simple Quadratic Equation, no linear term

[premo79]

Yeah this was right on time

[1espy3]

Omg, thank youu sooooo muchh this actually helped me with my homework.

after many hours of searching through google, i went to youtube and searched quadratic equations and found this ! thank youuu soooooo much lol it helped ALOT (:

[mikey9890]

where did u get r from?

[hijackdrc]

you can solve it in the head

[minkusbc]

@hijackdrc Yes those grade sixes who watch this should really know how to do this! Remember, these videos are aimed at all different types of students from 6 to 96. I have met many students, right up to the 12th grade, who look at this, at don't know where to start.

[hijackdrc]

you xcan solve it in the head

[Dylan5040]

my maths teacher is real bad and if u ask 4 help she just gets pissed at u but ur real good thanks she spent 3 weeks teaching us this and no1 got it but in like 2mins i get it thanks to u :)

[ShakkIsLife]

I have no idea what a Quadratic Equation is, but why didn't you sold for the O?

^Might have been the dumbest question, but I really don't know o_O?

[GamerX299]

add &fmt=18 at the end of the link for sound :D

[minkusbc]

@GamerX299 How can I, as the author of this video, add " &fmt=18" to the end of the link permanantly? THis is really getting me down as videos that were once with sound, now are no longer "with sound".

[SkyyyPHUN]

whats up with the sound bro??

[ScrewedUpDNA21]

Is there supost to be any sound?? Thanks a heap!!! I finally get it now!! (This is NOT sarcasm) Um but could u possibly explain the part from 02:43 to the end. I could'nt understand it how 13x2+5=8x2+3 Thanks!

[ShimmerDiamond2]

thanks so much 4 this bcuz ii have a msth regents and mii math teacher can;t teach

[iTooGodly]

minkusbc, help me. why is it 13x2 - 8x2? (3.14) i thought it would be 13x2+8x2?

[Sandrinha268]

Good explanation

[MBJH17isbackonlyone]

wow thanks dude i learned it thnks again

[minkusbc]

@matamoovi The average British Columbia Teacher gets about $72,000 for a ten month year. In addition, they have a deduction for their pension (fully indexed) that is considered the "cadilac" of pensions, and they get their health care fully funded. This is after 5 years University and 9 or 10 years of work. In my years of teaching fulltime (approximately 33 years) I worked about 2,000 hours a year for my salary. This included teaching, preparing, marking, entering marks and comments on reports.

[KKOPPI]

@minkusbc

oh gosh $72000...

[gromshit101]

great video hope it helps me for my quiz tommorrow!

[wannagetdrunk69]

I found this to be a good refresher on what a linear quadratic equation is. Now I just have to figure out how to apply it to university chemistry. And to all you little turds out there that think this is so easy, wait til you get to university. It's a needed piece of information that enters into several courses of any science field. And to the instructor, thanks for going at the pace that you did, and thanks for explaining why each step was done.

[iAmSam480]

...is this guy canadian?

[kilograms2500]

thanks sir.

[mp3monkey1]

Thanks keep it up. You da man

[joshmolina3]

Thank you soooo much for this video.

[chipilon82]

Then why are you watching it..

some people need help on this..

thats why its there for them ...

[D0nRidah]

it s unbelievable people need to see a video to solve that

[minkusbc]

Yes those grade sixes who watch this should really know how to do this! Remember, these videos are aimed at all different types of students from 6 to 96. I have met many students, right up to the 12th grade, who look at this, at don't know where to start.

[D0nRidah]

i never understand when talking about grades and all that stuff because i m french, but i remember we learned that when i was like 11/12 yrs old. And it s funny you use the world quadratic, we call it "trinome du second degré" , quadatric forms are mostly used in bilinear algebra with matrices

[wbVeigYEzs]

@D0nRidah It's unbelieveable you can't use apostrophes. But I guess you're better at maths than English. It's also unbelieveable that you don't realise this is part of a series. It's also unbelieveable that you don't understand that some people have to do this for the first time at some point. It's also unbelieveable that you can't figure out that even though people can do this, they might need to do it fast, therefore need practice and explanations for it to become second nature. Fag.

[D0nRidah]

@wbVeigYEzs it s also unbelieveable i can speak english fluently and you can t make a sentence in my language^^

[Nd4Spdr]

@D0nRidah Umm... Do you know what a sentence is? Because I see several in wbVeigEzs's post. Moron.

[D0nRidah]

@Nd4Spdr damn you re so stupid that s unbelievable... i m not from an english speaking country

[Nd4Spdr]

@D0nRidah damn you're so stupid you must explain you're from another country more than once. Am I supposed to be impressed?

[RickiKeith]

You're Unbelievable! :)

[Nd4Spdr]

@D0nRidah what a jerk!

[crazymate2000]

@D0nRidah im crap at maths so f**k off.

[mikeroephonics]

Thanks! Very simply explained! This beats my high school algebra teacher who was about as exciting as a box of hair.

[LilBlacJac510]

Man I would love to be a teacher, but they dont get paid shit.

[minkusbc]

$72,000 to $80,000 after nine year's teaching PLUS the cadilac of pension plans is pretty good, no? This is up in British COlumbia, Canada

[LilBlacJac510]

Yeaaa incase you havent recognized my area code 510 thats in america, so I not sure who gets paid more in Canada or America.

[BboyBRad07]

Maths is said in england, india, south africa, and australia. It's also writen the same way in french meaning with the "s" but in america everybody says and writes math. It's nothing to fight over.

[SKAD4LIFE86]

wow quadratics make hulk angry, hulk smash! ....got a vid on finding vertex and x/y intercepts of a quadratic equation?

[backlip19]

you're my savior! i'm not even joking!!!

helped a lot! tyvm

[spikeman23]

It really looks harder than what it is. Like any of the higher level math you just really have to watch what you are doing.

[siskar13853]

this doesnt help!!!!

[minkusbc]

I'm sorry, what about the video did you find confusing?

[hismyman3635]

I GET IT!! thank-you! should pass my exam now.

[teenwolfforevs]

thnx that helped me wit my work tonight you rock

[jaymartcaster]

math sucks!

[ananbaransy]

NO IT ROCKS!

[Shoshin420]

math sucks!

[ananbaransy]

lmao it rocks!

[Blobsterisation]

it's "maths" not "math"

[Shoshin420]

oh i diddent kno maybe thats why it suckS

[Blobsterisation]

What..

can't you speak properly LOL

[ButchKing01234567]

shut the fuck up. who says ur fucking perfect fuck face.

[Blobsterisation]

.. I don't think anyone did actually.

However I can speak properly if that's what you mean by "perfect"

good luck in life if being literate to you is perfect

very simple person

judging by your swearing i'd say yes.

[ButchKing01234567]

u think ur so smart and PERFECT do u, well y are u looking at his vids. Ur stuck up ur own hole and fortunately 4 the rest of us, u suffocate and die.

[Blobsterisation]

Nope, not once did I say I was smart or perfec - JUST literate. Which as I said, if you count that as perfect then your standards are very low.

And what gave you the idea I suffocated and died ?_?

[batista981]

@Blobsterisation Lol well said

[Blobsterisation]

LOL y fank u and merry xmas xx

[MrDstag]

i wish u were my math teacher

[ChainBlade8]

What do you do if the 32 in Method 1 has an x too?

[ChainBlade8]

has an n too, I mean

[93alvbjo]

you're gonna have to factor then.

[tubzza]

what is the answer to 3x^2+2x-6=0 is

[minkusbc]

See my video on solving quadratics using the quadratic formula, since this cannot be factored. Using the quadratic formula you get: x = 1.12 or x = - 1.786.

[blokeatone]

Do you have a dvd for sale?

[rhimae24]

should the answer for the last problem be "no answer"?.,.i suppose it should be represented through an imaginary number,.,.tnkz.,.your video was very helpful

[Teganor]

Um, would the answer to the last problem be an IMAGINARY number "i"? Why put "no answer?" This isn't a multiple choice test.

[mksr92]

Nice! but simple, i've had this already :D

[NahidAhmed101]

this was real helpful! good job

[FireSign27]

Wow i was just going over this stuff for my a levels. Solved it ni like 5 secs, sry if im bragging but its cool lol.

The n = 4 or -4 is really simple though.

n² = 16. so

n = √16 = 4 or -4.

When you multiply or add a negative to a negative, the answer is allways positive.

so -2 x -2 = 4, -5 x -2 = 10.

n² in this case = 4², thats n = 4 x 4.

but n also = -4 x -4.. since -4 x -4 is 16, and 4 x 4 is also 16.

[l33tVirus]

@ cradleofjohannes

"x = +4 or -4" makes sense because both of those numbers squared equal a positive 16. You have to account for both positive and negative numbers when solving a quadratic equation simply because it is true.

[guheyin001]

that's just only basically in Thailand

Children start learn this lesson since they

just 12 years old

[cradleofjohannes]

im in eight grade and idk this how does n square = +4-4= 16 it is suppose to be -4 * -4 or +4 * +4

[nejtilsvampe]

(-a)^2 = 4^2

so (-4)^2 = 4^2 = 16

understand? negative times negative equals positive.

[Jewsoftheworld]

i dont really get the last part. about the square rooting of a negative number.

[bullcrapp]

For the last question, I think instead of saying no-no as the answer, you should just let people beware there is an actual answer to it. Although they probably wont need to know it.

[yubac]

you are the man, i have an exam tomorow this is definatly going to help:)

[LxxMelloxxMatt]

great explanation!

thank you!

[12345OUFC12345]

dont get it, im fucked

[M16second]

I learned this in my freshman year of high school

[minkusbc]

Yes, it usually is a grade 9 equation. However, since it is technically a "quadratic", I have included it here. In fact you could solve it using the quadratic formulas with a = 2, b = 0 and c = - 32.

[zeldadevideos]

one your second example what if when i devide it doesnt cancel out?

[minkusbc]

If, when you divide, it doesn't cancel out, that is alright. You will just be taking a square root of a decimal or a fraction.

[GoldenHitman92]

cheers for your quick reply i get how it works now i found the square route first rather than dividing first

[GoldenHitman92]

ite well instead of making it that complicated cant u just take 5X^2 = 25 and do the square route of 25 which is 5 which wud be equal to 5X then 5 / 5 =1 or X which wud make X=1...

[minkusbc]

No, x = 1 does not solve the equation, 5 (1)^2 = 5, not 25. You have to isolate the power by dividing by 5 first, then take the square root. If the equation had been (5x)^2 = 25, then you could do it your way and the answer would be x = 1. Thanks for your feedback though.

[renijohn012270]

Thank you soo much for being a teacher we can understand!

[Amie08x]

Thank you for this video! Everyone who finds maths difficult should watch this, we can't all be great at it.

[bigjay10]

WHY IS THIS EVEN NEEDED IS MY QUESTION

[minkusbc]

It's there because it is technically a "quadratic equation", just one without a linear term. I wanted to make sure that all types of quadratic equations were covered. This particular equation is easy enough that students in much earlier grades can solve it. However, it is a "type" of quadratic equation, so that's why it is here.

[bigjay10]

o no i didnt mean it like that im still in high school so we often time ask the question why is this certain type of math even needed

[afdhalatifftan92]

Good question!!

[lavenderxx]

help please! T_T

how to factorize:

1914 =x(35x-2x)(28x-2x)

[pritri01]

I love this video and will make my daughter who is 11 and covering this in class watch this. thanks - please make more videos.

[321alk]

haha it's so easy,but my Quadratic Equation it's not easy it look like this : x²-(2m+1)x+1=0 and the kondition is x1x2²+x1²=4

[GreekPrideSlavHonour]

Wow I am from Bulgaria and we did this in 6th grade!

[rvdrvd45]

i am in portugal 6 th grade and i do this easisly

[Spi3geL]

you americans are stupid, in holland you get this when your 12 yrs old, hahahah

[minkusbc]

I have taught this particular quadratic to grade 8's (no linear term), so they would be about 12 or 13. However, the other quadratic equations don't come in to the Canadian curriculum until grade 10, so it would be for 14 o 15 year olds.

[serpent49374]

I've had a maths teacher even better than this, but this really helps a lot.

[sasukemax]

thanks this helped a lot! dang wish this was my teacher, my teacher now sucks! Whenever someone asks a question he does three things; says "I don't know", stares at us, or ignores us

[cannonballs26]

This really helped me pass my quadratics final. I learned more from this video than from my teacher. Thank You!!!!!!!!

[Schutzstafell]

Watch this guys videos, study this now, sail through it later, it's a nice feeling to be better than your peers.

[dog5hittacos]

man, i wish i saw this when i was 5....he explains it so freaking well......a 5 year old would get it. WHY CANT ALL TEACHERS BE LIKE YOU

[dytakeda]

Be careful when using the radical sign showing to "take the square root." It means "principle square root", which is the positive square root.

[cherrypopman]

why can't all math teachers be like you.

[asemballer]

this is doooooooooooooommmmmmmmmmmmm

[atvkid11031]

im 13 and i can do this!

[skipwner]

i'm eleven and i can do this!! its not that big of a deal

[Hamhark98]

I had a friend (korean) who learned this when he was 9, so yeah. I know it too but considering I am 15 it is not a big deal. Of course I know a lot about other shit as well.

[killerkitty777]

its amazing how much math oriental and mid-eastern kids learn in school!! they do our gr 12 stuff in gr 9!!

i think our system is keeping us stupid..a smart citizen makes more noise than a dumb one...we dont have dictatorships to control the 'brainy' masses like they do lol

(or DO we? ie. martial law and FEMA camps.. creepy as math it is )

heck, ppl in North America here still think Bush had reason to go into Iraq when there was no evidence BEFORE they went in either. 1+1=2 Mr Prez roflmao

[1034]

I'm a second trimester fetus and I can do this.

[deadlyc1n]

include complex or imaginary numbers please

[ricco96]

Thanks, this made more sense than to what I learned today at school!

[YourTubeStudio]

I am actually doing this in my math honours class right now and I am getting an A! This stuff is so easy!

[rockingmonster12]

you are the best teacher ever

[rockingmonster12]

hey dude you are so awsome thanks alot, i dont even know how much i could thank you. my stupid teacher alwyas tells me but i never got it. thanks again

[qpwoeirutyzmxncbv123]

thanks so much that helped heaps! much easier than i thought it would be!

thanks again

[minkusbc]

I have a video on solving quadratic equations by graphing. Search minkusbc quadratic

[extremeknock4]

This is helpful kuzz i have not been getting this in klass. Thankz

My teacherz a bitch

[wright3]

On the last problem he says that X = No answer. That is wrong. X = sqrt(-2/5) can give complex answers. In this case X = i sqrt(2/5) where i = squrt(-1)

I am surprised he didn't mention this. Even if that concept isn't used in beginning algebra, to say that there are no answers is just wrong.

[minkusbc]

Of course, you are correct, in that imaginary numbers do yield two answers. I probably should have mentioned that, although these videos are aimed at Math 9 to 12 levels and imaginary numbers are university level.

Thanks for your comment.

[mia2333]

hey can you do that same problem but with 32 x or n squared? please

[RhodesianRider]

LOL this is not the formula - it is = [-b+-sqrt(b2 -4ac) ]/2a

[minkusbc]

You do not need the quadratic fomula if there is no linear term (the "b" in the formula would equal zero)

[RhodesianRider]

True but without B the equation just reduces itself.

[searchadvancedupload]

lol pwned

[Redemptioner123]

wait a minute. is this the square root formula in the first question?

[Redemptioner123]

I feel desperate. The text book didnt have any examples on non x terms. It bugged the crud outta me. California algebra one book wasnt very specific

[sebkl21]

thank you it really helped. I have one last question now how do I get the vertical stetch or compression ? ill be ok after this one ... hehe

[minkusbc]

The number in front of the x^2 is the vertical stretch (if it is greater than 1) or compression (if it is less than 1). If it is negative, it flips the graph over.

[wubangguo]

You are good man . Pro.

[sebkl21]

sorry the 2 after (x+2) is exponent an 2

[sebkl21]

Without graphing the following parabolas, find:

the direction the parabola points

the axis of symmetry

the vertex

the horizontal translation

the vertical translation

the vertical stretch or compression

Can you please show me how to get these answers without graphing? Thankyou so much

[minkusbc]

Let's pretend are equation is y = 2(x-4)^2 +5

Then Positive 2 means it points in the positive y direction (up) and is expanded by 2 in the y-direction (vertically). Take the opposite of the number in the brackets, but not the opposite of those outside of brackets and you get the vertex at (4,-5). This gives you a horizontal translation of +4 and a vertical translation of -5, the axis of symmetry at x = 4. Hope this helps. Now do the over/up table from (4, -5) and you have your graph.

[sebkl21]

thank you for such a quick response. I just lost you when you got (4,-5)... the opposite of the brackets is (-x+4) how did you get the -5 ? lets see ... heres another equation:y = 4(x + 2)2 + 2

so positive 4 means it points up and expands vertically by 4 also. then the vertex would be (-2,-2) ???

[minkusbc]

Sorry, I took the opposite of both instead of just the one in the brackets. Vertex of y=2(x-4)^2+5 is (+4, +5), Vertex of y=4(x+2)^2 +2 is (-2, +2)

[arykhoon]

i love you.

[sanshuz]

no not the border guard. It's the navy seals

[ila39]

thank you, your videos are very helpful

[Danny7930]

no clue what the H yor talking about but its good

[muneco100012181]

I just wanna say that all of your videos are GREAT, and have helped me a lot, and really appreciate you helping people like me out by posting these videos. Thank you. George - Laredo, Texas :)

[dontcareanymor]

Hi,

Could you lead me to finding out how to do just a regular quadratic formula problem?

such as x=-b+- the square root of b squared -4 times (a)(c) all over 2(a).

Please?

[niktoblja]

how old r u?

Russian schools teach that since you are in 5 grade as I remember

[minkusbc]

I am just about 60 years old. Here (In Canada) simple equations start to be learned in about grade 7. I have taught this equation to students in grade 8.

[niktoblja]

I am sorry then.

I found the main idea of this video in other way.. I mean did not know who are you and what this about.

[cheeseischocolate4]

Im English and i'm 12, 13 at the end of this year. Am i too young? Because I understand this perfectly.

[yehzhaofeng]

thanks a lot!

[askaryambus]

thanks 4 this videos! it helps! ;)