Algebra 2 Problems - YourTeacher.com - 1000+ Online Math Lessons

[WarjaM24]

that 6 dislikes must be from our teachers xD.

[V2killah]

I fucking love you.

[jyjh1234]

3min of this video > 1 hr of my school XD

[bergaflickal]

why did he make it squareroot 7 over 3?

[skittozoe]

where did the 4/9 go in the 4th line ?

[AtlasRezzed]

@skittozoe It's because this method is actually fairly bad: what you should do is square the number insinde the brackets, and subtract it because you are trying to make it equal the original equation.

[Rutgerschiefs]

Thanks for this I have a big test today but, I have a snow day so now I will actually study all day

[lluisggGoggle]

He appears cautious in front of the camera, but he certainly knows his stuff.

[crazyfox266]

this is ridiculously man OMG!! if this is a problem I want to go to their's collage... i just can't believe...

[beano444]

This is so much easier than any other method i have tried to teach myself Cheers!

[tylorsalonia]

dude u have no idea how much your videos have helped me. My teacher in school is so hard to understand and plus its hard to concentrate. Here in the comfort of my home, i can sit down and learn something. u make it seem so relaxed. thank u. so much!

[MaybeBatman]

thank you. that's way less complicated than half of the other youtube instructors are trying to make it

[pd2181]

my teacher at school is an idiot this guy has taught me more in this video than she has all year

[supermonk3y07]

Hi, how can I solve this problem by completing the square?

9x^2+30x+25=11?

Any help would be appreciated, thank you.

[marmaladeboyloveryuu]

thank you sooo much(:<333

be my teacher forever? (:

[xButterflyAngel]

THANKS

[KillerSparks19]

Brilliant! I was having so much trouble understanding, and now I get it!!!!!

[concretecubes]

but if you use the quadratic formula you get a different answer,

why?T_T

[dethwing]

@concretecubes : They are the same. Perhaps you forgot to reduce square root of 28 to 2 * sqrt(7).

[pansoy14]

nice!like the way you teach

[Shadyac21]

Thanks this helped so much.

[maeanny2]

i was like

gahh just watching this is easy

then when i sovled how did he do it again O_O

oh well thanks for the help ^^

[99yearsleft]

great vid, i just watched it before an exam and is a great way to refresh my memory

[MonsterMashKiller]

you look EXACTLY like my actual math teacher.

[storrisi45]

nicely explained, just too slow

[KingdomWalkerZ]

complicated hehe.... try yaymath much easier to understand. and full of techniques how to speed up ur solving

[dared111]

Looks like Ianto from Torchwood

[iCRIM3WAV3]

Awkward last 3 seconds.

[bassSoloij]

That's what she said! xD sorry, i've got my test in 5 days and i'm dying!

[iCRIM3WAV3]

@bassSoloij

Lol, good one.

[DickDerrell]

I actually use this stuff to learn. Forget actual class in school. Aha. ;)

[theychosen1]

Well explained. Bravo!

[KeiChanPapu]

he looks like Angry Video Game Nerd

/shots

[Leeches93]

probably the longest and most complicated method, the Quadratic formula is much more efficient since you can find the vertex and the zeros with it and its quite faster.

[spacedoohicky]

The quadratic formula is a version of completing the square. Knowing the completing the square method from this video could give a student the upper hand with knowledge of the details of solving a quadratic equation.

[MonsterMashKiller]

the problem is, some people have trouble using "input formulas" and work better with "shortcuts" such as completing the square. i prefer the formula approach to things.

[N6ACM]

ooo hell naw..this is too long ma manz...there's gotta be a shorter way to get this!

[yaykaboom]

why dont they show this on dora the explorer or sesame street

[barradepololaris]

far too long.. seriusly.. youll waste half your exam time using his method

[dbyrness]

This would help me if he did it the same way my teacher does.

Her way is SO much more simpler..

Less fractions.

I hateeeeeeee fractions.

[Kphyl]

this is really helpful for my half yearly exam ^^ thank you!

[Biederwolf]

this shit helped a lot. thanks!

[killkayla]

try this one square root of x+6 plus the square root of x-2 equals 4...

[Okalani5000]

This excites me sexually. I heart education.

[RALMAR9]

you loser

[iTylerIsTheName]

I love to learn.

[chile1231]

good video

[k00lkid333]

i solved the equation using completing the square and i got this

3(n-(2/3)+ or -(1/3 squared)

[engkngorks]

wohooo wohooo this is great great great, i love math professors

[poonypoony7]

ur saving my life LOL i love u.

[danemarknine]

It is obvious some of you are not teachers. Completing the square is a necessary skill to learn as some calculations outside of factoring may require it. He knows what he is doing. Shut up and learn.

[MattkNT]

he helped me!!!!!!!

[thyanic]

huh?

[bebexdi]

VERY HELPFUL!!

[juelz033]

man you have helped me so much this semester thank you so much!!

[naiproductions]

This is a very good video. Yet I'm finding examples where the second number is even when my equation reads 2y^2-5y-7=0 and I can't for the life of a good grade solve this!

[kaziiftekhar]

it's true he was showing off, if you can't factor simply use the quadratic formula no need to go through all that hassle dumbo

[jtxwatches]

Have you tried coffee? It's good with milk and sugar.

[TURQUESAMBER]

PERFECT

[loveloreal]

thanks for this. it was very helpful

[bluzfreek]

This was extremely helpful! Thanks!

[BrettersonX]

if a quadratic does not factor easily you can always use the quadratic formula:

[-b+-sqrt(b^2 - 4ac)]/2a

subbing in from ax^2 + bx + c = 0

[elliegurl297]

what is the equations hasent got =0 on the end does it matter? do you jsut out one there? for example 3x^2-12x+3

[perrildearioto]

Help!

Can you plss help me with this equation:

15-6x-2x²=0

I've tried so many times and can't get it tight :(...

[ncseal]

have you tried solving it as 2x²-6x-15...kinda simple if you follow him step by step...

[StreetMagicTeacher]

perrildearioto, it is quite simple, you just have to multiply both sides of the equation by negative 1, and you will get 2x^2+6x-15=0. i believe you can solve the equation from here

[Sophieeeexo]

You make it look too complecated, there's a muh simpler method- stop showing off- you prick!

[ncseal]

lol

[Avi0107]

thanks!

[jezraelfederico]

it really helped me alot thanks!

queston: how come that the 7/9 became 7/3?

[dreamerchaser101]

im stuck on that part too

[Robs179]

in order to get rid of (n-2/3)2 we have to square both sides. When we try to square 7/9s we see that 7 can't be squared but the 9 can (square root of 9 is 3). After squaring the 9 we are left with the (square root of 7) / 3

Hope this helps

[Johannady]

wow thanks!!

i didn't know that you can't have a coeficient on the squared term...

if you haven't said so, just might have a bad grade on tomorrows quiz!

[rpdwpb]

I have been trying to do these problems for an hour..... 3 minutes of these 2 videos and Bam. I got it!

[xxSuperkidxx]

ok...one word....ty have no idea how much u saved my ass....keep makin these vids...

[timsolovyev]

very helpful for preparing for the algebra test tomorrow...

[Efferion]

very nice

makes it look totally easy and/or makes my lecturer look like he should quit teaching

[pkbarbiedoll]

at 2:18 - how do you know this is perfect? Is it because there is no coefficient on the leading term? Please help me understand.

[888Xristos]

(You're probably past this in your studies, but here's an explanation...)

NOT because "a" (the leading coefficient) = 1!

If I told you that x^2 + 6x + SOMETHING was a perfect square trinomial, how would you find out what SOMETHING is?

Perfect square trinomials are in the form:

a^2 + 2ab + b^2. In quadratics, "a" is usually X, and "b" is usually a CONSTANT (number, like 3 or -8). If we set x^2+6x+SOMETHING =a^2+2ab+b^2, we get:

x=a

6x=2ab -> 6a=2ab -> b=3.

So b^2 is 9, which we add to both sides.

[ppdog27]

that is awesome. for the life of me i could not remember how to derive the quaratic formula... now i know

5/5

[exhilerator]

very helpful