(x-y)的2次方+3(y-x)因式分解

分类: 作业答案 • 2021-12-28 15:09:18

问题描述：

答

(x-y)²+3(y-x)
=(x-y)²-3(x-y)
=(x-y)[(x-y)-3]
=(x-y)(x-y-3)