括号内x的二次方乘以y的三次方括号外的4次方？

Question

如题所述

Answer 1

-(y-x)^2X(x-y)^3X(y-x)^4
=-(x-y)^2X(x-y)^3X(x-y)^4
=-(x-y)^9。本回答被网友采纳