(a-b)³×（a-b）²=?(x-y)×（y-x)³=?

分类: 作业答案 • 2022-03-16 15:00:18

问题描述：

答

(a-b)³×（a-b）²
=(a-b)^5
(x-y)×（y-x)³
=(x-y)×(-(x-y)³)
=-(x-y)^4