一道因式分解题 ,说一下(x-2y)x3-(y-2x)y3=(x+y)(x-y)3得出结论的过程

问题描述:

一道因式分解题 ,说一下(x-2y)x3-(y-2x)y3=(x+y)(x-y)3得出结论的过程
要过程,详细一些

x^4-2x^3y-y^4+2xy^3
=(x^2+y^2)(x^2-y^2)-2xy(x^2-y^2)
=(x^2-y^2)(x^2+y^2-2xy)
=(x-y)(x+y)(x-y)^2
=(x+y)(x-y)^3