(x-y)平方+2x-2y 因式分解
问题描述:
(x-y)平方+2x-2y 因式分解
答
[x-y]乘[x-y]+2[x-y]
[x-y+2]乘[x-y]
答
提取公因式(x—y)得:(x-y)(x-y+2)