Simple algebra simplification SOLVED!

1. Feb 28, 2012

Savipats

1. The problem statement, all variables and given/known data

2. Relevant equations
a^2-b^2 = (a+b)(a-b)
a^2-2ab+b^2 = (a-b)(a-b)
a^2+2ab+b^2 = (a+b)(a+b)

3. The attempt at a solution

SOLVED IT! Look at the bottom!

With my first try i got the answer 0
The result of first parenthesis was 1 /(√x+√y)

From there on it went like this 1 /(√x+√y) - 1 /(√x+√y) = 0

I'm suspecting that i might have messed up the order of operations, but not sure. I did the calculation inside the paranthesis first, then reversed it (^-1)

The answer should come like this
(2√y)/(x-y)

Solution:
Should be more careful next time.. i made an error when writing it down for myself. :) Now, with the correct signs i got

1 /(√x-√y) from the first paranthesis, and from there on it was all piece of cake. Thanks.

Last edited: Feb 28, 2012
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