Dividing Radicals Using Conjugates - YourTeacher.com

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.

Category:

Education

Tags:

• dividing
• radical
• divide
• division
• square
• root
• roots
• radicals
• advanced
• conjugate
• conjugates

[SiecleDamour]

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

[grig24x]

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[sk8mastayea]

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[lolopopojr]

hes not hot. lmfaooo

[BKsFiNeSt08]

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[iWriteUinMyDeathNote]

@nettiesmusic he used the distributive property

[iWriteUinMyDeathNote]

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[MrPentagonal]

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[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-

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[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