x^2(x-y)^2-4(y-x)^2帮帮忙啊~

问题描述:

x^2(x-y)^2-4(y-x)^2帮帮忙啊~
分解因式

x^2(x-y)^2-4(y-x)^2
=x^2(x-y)^2-4(x-y)^2
=(x-y)²(x²-4)
=(x-y)²(x+2)(x-2)