化简：｛(a2-4a+4)/(a2+2a+1)｝× ｛（a+1）/（a²-4）｝

分类: 作业答案 • 2021-11-12 23:09:20

问题描述：

答

｛(a2-4a+4)/(a2+2a+1)｝× ｛（a+1）/（a²-4）｝
=[(a-2)²/(a+1)²]×[(a+1)/[(a+2)(a-2)]]
=(a-2)/[(a+1)(a+2)]