Question

find the product of (x^2y^2-5)^2

Answer 1

remember
(x^m)(x^n)=x^(m+n)

(x^2y^2-5)^2=
(x^2y^2-5)(x^2y^2-5)=
x^4y^4-5x^2y^2-5x^2y^2+25=
$x^4y^4-10x^2y^2+25$