提取公因式法

题目

提取公因式法
(x+y)²-(x+y)³=
(x-y)²-(y-x)³=
(x-y)²-(x-y)³=

答案

Amuletの琉音,你好：(x+y)²-(x+y)³=(x+y)²(1-x-y)(x-y)²-(y-x)³=(x-y)²+(x-y)³=(x-y)²(1+x-y)(x-y)²-(x-y)³=(x-y)²(1-x+y)