Question

Factor the following polynomial completely. -x2y2 + x4 + 9y2 - 9x2

Answer 1

Step-by-step explanation:

x^4-x^2y^2-9(x^2-y^2)

=x^2(x^2-y^2)-9(x^2-y^2)

=(x^2-y^2)(x^2-9)

=(x+y)(x-y)(x+3)(x-3)