Dividing Radicals Using Conjugates - YourTeacher.com

[sk8mastayea]

u are boringggg

[lolopopojr]

hes not hot. lmfaooo

[BKsFiNeSt08]

I hate ads. You lost my sub

[iWriteUinMyDeathNote]

what the hell is wrong with you people... he's not hot eww

[MrPentagonal]

his shirts are always too big.

[metube930]

Shouldn't 5 in the final answer be positive??? I think it should be positive. :)

[eastbay202]

i love it after he does the equation and looks into the camera-

"yeah i just did that suck my dick"

[haaahaaai]

i get it its 5×2=10

then 5 ×-1{7  the 1 its Hidden so = 10-5{7

thaannnx theeach i hope you Smile some day xp

[haaahaaai]

how do you get 10-5{7 ???

[xRiotxful]

easy peasy

[hawkeyeted]

The dude is SWIMMING in that shirt! Way too big for him!

[nettiesmusic]

why do you have the 5 if 5 times 2 is ten?

[iWriteUinMyDeathNote]

@nettiesmusic he used the distributive property

[penguinsforu]

D: i cant find wat im looking for!!!!!!!!!!!

(p.s.:>.< i cant find the vid an this still isnt it)

[AIFRANCHISE1]

Thank you based god...

[TREVORisSICK]

so what if the demonator is 2 times sq root of 7?

[bob89377]

I GET IT FINALLY!!!

[iamGlitzyGrace]

when we will know, where to put the negative sign in the middle?.. what I know is that the negative sign will appear there, if the first term of the numerator or the denominator is negative..

But in this case, we put the negative sign in the middle because of the denominator. But how if we simplify the negative sign in the denominator?

so the numerator will be change.. it will become 10+5 sq. 7 .....

Anyone can help me here.. pls ;)

[es696]

@iamGlitzyGrace - you switch the sign infront of the radical term. so when you foil out the denominator, you have +root7 and -root7. which cancels it out of the denominator!

[Coptersa007]

i just got confused at 1:24 very very confuse. explain clearly by writting not only your mouth

[awesometimesure]

I just got confused more. exams screw you.

[MTAL4ever]

lol math exam in 10 hours .......

[imyourcreeper]

Wtf r these root things even for?!?!?!

[tsagona1]

I think the reason he doesn't simplify the 10 -5sq rt 7 is because it isn't 10 minus 5, it is 10 and the -5 sq rt 7 is an entity all its own. It's not 10-5, sq rt 7 but rather 10 (-5 sq rt 7) but the parenthesis are only there to show you in this explanation that the 10 is separate from the -5 sq rt 7. Hopefully you can understand what I'm trying to say.

[iamGlitzyGrace]

@tsagona1 so, you mean to say is.. He needs a parenthesis inorder to have a negative sign in the middle.. ?

(:

[janicescoles]

He uses what he refers to as the distributive property because the 5 has to be multiplied by both the 2 and the sq rt of 7 which would read 5 x 2 (10) and 5 x sq rt 7 which equates to 10 - 5 sq rt 7. That's how he arrives at the 10 in the numerator.

What I don't hear him explain is why he doesn't break down (simplify) the numerator to 5 - sq rt 7 instead of leaving it at 10 - 5 sq rt 7. Can anyone explain that?

[ilovemusicfyi]

You explained what my parents couldnt explain to me in 45 minutes in a short 2 minutes. Thanks

[corrina253]

This man makes math look so easy when IT IS NOT.

[dancergirl1348]

why is it 10-5 in the numerator? (help?)

[iYateszy]

@dancergirl1348 (5)(2-root7) = 10-5root7

[LunqvistNabokov]

@dancergirl1348

Because he's multiplying the - by 5. If you don't see a number, it's considered a 1. So, basically, he multiplied 5 * -1 = -5

[phillieblizunt]

how you get 10-5 in the numerator again that lost me

[WishFredWasDead]

I have just been mind fucked with math....

[TACOOOOOOOOOXD]

Yet it takes my teacher 10.36.33 hours in a week to complete radicals (dividing radicals), and it takes this guy 2min. 06sec. and yet I comprehend this guy allot better!!!

[GH02T823]

damn :) he is hot

[w5110]

2:23 

[grig24x]

wow in school I sleep then i get home and watch your videos, i love your videos they are so hot!

[mrhindo]

@grig24x

yea... lol me too

[SiecleDamour]

Couldn't they have gotten somebody not smolderingly hot to do this so I could actually concentrate on the math?

[McSpizzy]

@ryanfireball100 I posted that comment over a year ago, why would you reply to it?

[Spicygummybears]

....Shit, I still don't this.

[pepperplume]

he DOES stand there with that "i pwned that shit" look lul

[dmanschaumbizzie]

@pepperplume hahahahha

[bizzchannel]

wow wow man. Could you explain what you did when you say DISTRIBUTE the top? I think you multiply 5x2=10.. so you put 10, but why you put -5 rute 7????

[missalliecat04]

This is waaaay easier to understand than my teacher! I haven't learned crap all year:/ Okay, this guy isn't the most exciting teacher/tutor in the world, but at least I'm able to understand the guy!

[crapstanksucker]

thank u i oassed my final from this boring crap but still u suk lolz

[DaemonLEONE]

That's not as hard as they make it seem in school , Geez, my math teacher is from like Germany & makes this seem so difficult -__-

[BruceLeeKills1]

What if you have radical 5 over six multiplied by radical 3?

[mnmluver2598]

Pwn!

[MrAbedsaid]

I quit

[jezus1212]

wtf? 4- -7 is 11 not -3???

[Luvs23]

@jezus1212 THE SQUARE ROOT OF 49 (a perfect square) is 7

[spclagentsteve]

??? one of the most basic math laws.

if you subtract a negative, it's just like adding a positive.

[JVLCEK26]

its a positive 4

[FelzX]

4 have no -!

the minus is from the 2*-/(7)

[koreanpopaddict]

Lol you got it mixed up. The line of the problem of which you speak is 4 - 2(sqr of 7) + 2(sqr of 7) -7. You seem to be stuck with this problem: 4 - -7, but in fact the first negative sign from (4 - -7) is actually referring to the first 2 in this expression:4 - 2(sqr of 7) + 2(sqr of 7) -7. So therefore, it is (4 - 7) not (4 - -7) and the answer would be a -3 and not 11.

[wondergirlsy]

@jezus1212 you are stupid

[888Xristos]

@jezus1212 "4 - -7 = 11", but that's not what we're talking about here.

This is 4 -7, which = NEGATIVE THREE.

[SnowLeopard7]

Wow! I wish my math teachers would have been this good when I was in school. They always seemed to make things harder than they actually were. Seriously, I found it much easier to figure out how to do things on my own by looking at the step by step examples in the book.

[justpeachygreen]

thank you so much!

[Sai64]

omg thx bro i finally get the hw

[teenagerPoP]

lol.

[BiK04]

I learned more from this video than i learnt in 2 weeks of math class

THANK YOU!

[shady4818]

he's good,really good.

[TheMissEllaneous]

Thanks teacher guy!

[MzAwsomeness2345]

he is definetly better than my math teacher too it just looks soo much easier when he does any problem but my math teacher makes everything more complicated than it really is

[roxykitabayashi]

he teaches better than my math teacher

i wish he's my real math teacher .-.

[roxykitabayashi]

@ McSpizzy

it's because the number sentence left on the denominator is:

4-7

so it's -3

it would be 11 if the number sentence in the denominator is -4-7

i hope i helped :)

[lica0009]

thanks poh..

[stiffypride]

Conjugates! Woot!

[McSpizzy]

1:52

Instead of the solution being -3, wouldn't it be 11 since your subtracting from a negative number?

[mistakrunk]

It'd be -3 because the 4 at the start of that denominator expression is positive.

Positive 4 minus negative 7 equals negative 3

(4-7=-3)

[BritishOneBMZ]

Yeah it's a mistake. I guess he didn't see it but it should be a 11.

[Thurak03]

were the 10-5root 7 come from?

[sugarlipsparkles14]

@thomashagen16 love the way you think lmao..

[EpicPrimeTime]

@thomashagen16 ohhhh oh he didnt just rape the question he destroyed the question

[gennkill]

@thomashagen16 ikr

[divinecm]

lol. our math teacher is nothing compared to this cute guy! :P he also explains the lesson better than my teacher -.-

[TheBC13]

this guy is a really good teacher

[rstvz1]

Ok please help me i have an algebra t3est in two days on monday determining basically my whole future i need to know if (-)numbers can have square roots ?? im confused because you say they can and my teachers say they cant

[gagal17]

- Radicals are made into fractions when they are bey themselves, but can remain negative in a term. example: -radical 7 becomes 1/ radical 7, but (1-r7) is also= (1-1/r7).

I hope u understand!

[CheckYesSabina]

@rstvz1 negative numbers dont have square roots. for example, -49. if you multiplied 7x7 you would have 49. thats not right. and a -7 x -7 would still give you 49. negative times negative is positive. therefore negatives cannot have square roots.

[emufriendster]

thanks you for your help because i past my exams!!!

[gmagcaleng]

what about cube root ?

[jessiestudioVMK]

I was taught that negative numbers cant have square roots. Nice video though

[Khraftervids]

@jessiestudioVMK

what that means is that if the negative is on the inside of the radical, then it would be impossible

[BurtsBeesLover]

this is finally maming sense. thank you so much my math teacher in class is a dumbshit!!!

[semperfi3794]

I agree its seems the dont teach but just assign homework

[logieparogie]

Thank you sir!!!!

[L0vEf0rEvEr8]

Auto jump my website more u noob.Later i get u jump down u retard.

[skatezombie808]

..im still lost on the test.

[Venezu3la99]

i herd dat.

[dearGODxLOSTisON]

i love these videos

really

i do

lol i love how at the end they just look at the camera with a blank stare

[CaseAub12]

ya the one girls stare is like shes waiting for the director to say cut

[popping01]

kick ass u rule

[600SELV12]

Thank You.

[StreetMagicTeacher]

MATH ROCKS

[slipknoter106]

lmao, maybe for you

[flameboy714k]

mentor 32 knows whats up!! good job man!

[RSalboftw]

thanx saved my life lolz

[lehma69]

That was really AWESOME THANK YOU!

[Charles2337]

You guys just saved my life.

[mentor32]

Youtube will definitely go down in history as one of the greatest websites, if not the greatest. Peace!

[siixtyniine]

This helped me so much! I never thought youtube would come in handy with my math homework. :D

[KBestMistakeS]

wow... you either know how to teach, or my teachers just horrible. haha.

This actually helped. =]

[FelixFelisis]

Thanks Dude!

[Shootkicksass]

I am completely impressed. Great Job.

[SIMMTa]

OMG. Thank you soooo much! I had so many problems with radicals. It's all so confusing! This really helped! Thanks!!!

[monkeyphishhead]

you guys rock

[skategenie]

nice