3 years ago

The following is PreCal 11, please give me help... Factor this: x^2 + 4xy + 4y^2 - 4z^2

1 answer:

5 0

Since both terms are perfect squares, factor using the difference of squares formula.

a^2- b^2= (a+b) (a-b) where a=x+2y and b=2z

(x+2y+2z) (x+2y-2z)

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