化简 (2a+3b-c)²-(3a-2b+c)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 11:33:08
![化简 (2a+3b-c)²-(3a-2b+c)²](/uploads/image/z/250251-51-1.jpg?t=%E5%8C%96%E7%AE%80+%282a%2B3b-c%29%26%23178%3B-%283a-2b%2Bc%29%26%23178%3B)
化简 (2a+3b-c)²-(3a-2b+c)²
化简 (2a+3b-c)²-(3a-2b+c)²
化简 (2a+3b-c)²-(3a-2b+c)²
(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
-5a²+5b²+24ab-2bc-10ac