Question

求因式分解 x^3y^3（x-y）^3+x^2y^2（y-x）^2

Answer 1

x^3y^3（x-y）^3+x^2y^2（y-x）^2

=x^3y^3（x-y）^3+x^2y^2（x-y）^2

=x^2y^2(x-y)^2(x^2y-x^2y+1)