化简 (2a+3b-c)²-(3a-2b+c)²

分类: 作业答案 • 2021-11-25 09:39:18

问题描述：

答

(2a+3b-c)²-(3a-2b+c)²
=[(2a+3b-c)+(3a-2b+c)]*[(2a+3b-c)-(3a-2b+c)]
=(5a+b)(-a+5b-2c)=-5a²+5b²+24ab-2bc-10ac