SOLUTION: Simplify each expression. Rationalize all denominators. Assume that all variables are positive. http://i732.photobucket.com/albums/ww330/school_hard/IMG_48321.jpg http://i7

Algebra ->  Rational-functions -> SOLUTION: Simplify each expression. Rationalize all denominators. Assume that all variables are positive. http://i732.photobucket.com/albums/ww330/school_hard/IMG_48321.jpg http://i7      Log On


   

Question 181492: Simplify each expression. Rationalize all denominators. Assume that all variables are positive.

http://i732.photobucket.com/albums/ww330/school_hard/IMG_48321.jpg
http://i732.photobucket.com/albums/ww330/school_hard/IMG_48331.jpg
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
%282-sqrt%285%29%29%282%2Bsqrt%285%29%29
:
multiplying this out you get
:
4%2B2sqrt%285%29-2sqrt%285%29-5.....the terms in the middle cancel each other
:
highlight%284-5=-1%29
:
sqrt%2848a%5E5b%2F12ab%29
:

:
sqrt%284a%5E4%29=2a%5E2