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May 27, 2015

Homework Help: Math(please check)

Posted by Hannah on Sunday, August 29, 2010 at 12:01am.

Simplify each expression:

1) (x+8)^2 = x^2 + 64

2) (x-2)^3 = x^3 - 8

3) (x-2y)(x+y) = x^2 - xy -2y^2

4) (x+2)(x^2+3x-2) = x^3 + 5x^2 + 4x-4

Are my answers correct?

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