(5x - y)^2 - (x - 5y)^2 / -4x - 4y

Here's what I got so far:

5x^2 - 2xy + y^2 - x^2 + 10xy + 5y^2 / -4x - 4y

and then

4x^2 + 8xy + 6y^2 / -4x - 4y

What do I do now? (Crying)

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- July 15th 2008, 08:26 PMprincess_anna57Simplifying this expression
(5x - y)^2 - (x - 5y)^2 / -4x - 4y

Here's what I got so far:

5x^2 - 2xy + y^2 - x^2 + 10xy + 5y^2 / -4x - 4y

and then

4x^2 + 8xy + 6y^2 / -4x - 4y

What do I do now? (Crying) - July 15th 2008, 08:31 PMTKHunny
1) Add parentheses so it says what you mean.

2 + 3 / 5 is NOT the same as (2+3)/5

2) Factor, Factor, Factor

4x^2 + 8xy + 6y^2 = 2(2x^2 + 4xy + 3y^2) -- For example