Factor the following polynomial completely. -x^2y^2 + x^4 + 4y^2 - 4x^2
-x^2y^2 + x^4 + 4y^2 - 4x^2 = x^2(x^2 - y^2) + 4(y^2 - x^2) = (x^2 - y^2)(x^2 - 4) = (x - y)(x + y)(x - 2)(x + 2)
Question
Updated 1/24/2016 1:15:52 AM
Edited by Andrew. [1/24/2016 1:15:52 AM]
Rating
3
-x^2y^2 + x^4 + 4y^2 - 4x^2
= x^2(x^2 - y^2) + 4(y^2 - x^2)
= (x^2 - y^2)(x^2 - 4)
= (x - y)(x + y)(x - 2)(x + 2)
Confirmed by Andrew. [1/24/2016 1:15:53 AM], Rated good by Andrew.

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