Question

还有个问题...多项式 2x^2 y^2 - 2y^2 + (xy-1)(x-1)^2 因式分解后所含有的因式是

Answer 1

原式=2y^2(x^2-1)+(xy-1)(x-1)^2

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

=(x-1)[2y^2(x+1)+(xy-1)(x-1)]

选C