For a complete lesson on dividing radicals using conjugates, go to http://www.yourteacher.com – 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to get rid of a radical in the denominator of a fraction when there are two separate terms in the denominator, by multiplying both the numerator and denominator of the fraction by the conjugate of the denominator. The conjugate of an expression is identical to the original expression, except that the sign between the terms is changed. For example, the conjugate of (4 — 2 root 3) is (4 + 2 root 3). So to simplify 4/(4 — 2 root 3), multiply both the numerator and denominator by (4 + 2 root 3) to get rid of the radical in the denominator.
24 Responses to Dividing Radicals Using Conjugates – YourTeacher.com
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NASA's Sentinels of the Heliosphere
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u are boringggg
hes not hot. lmfaooo
I hate ads. You lost my sub
@nettiesmusic he used the distributive property
what the hell is wrong with you people… he’s not hot eww
his shirts are always too big.
Shouldn’t 5 in the final answer be positive??? I think it should be positive.
i love it after he does the equation and looks into the camera-
“yeah i just did that suck my dick”
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
how do you get 10-5{7 ???
easy peasy
The dude is SWIMMING in that shirt! Way too big for him!
why do you have the 5 if 5 times 2 is ten?
D: i cant find wat im looking for!!!!!!!!!!!
(p.s.:>.< i cant find the vid an this still isnt it)
Thank you based god…
so what if the demonator is 2 times sq root of 7?
I GET IT FINALLY!!!
@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!
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
@tsagona1 so, you mean to say is.. He needs a parenthesis inorder to have a negative sign in the middle.. ?
(:
i just got confused at 1:24 very very confuse. explain clearly by writting not only your mouth
I just got confused more. exams screw you.
lol math exam in 10 hours …….
Wtf r these root things even for?!?!?!