(3a-4b)(7a-8b)+(11a+2b)(8b-7a)的解题过程

分类: 作业答案 • 2021-12-31 14:11:13

问题描述：

答

(3a-4b)(7a-8b)+(11a+2b)(8b-7a)
=(3a-4b)(7a-8b)-(11a+2b)(7a-8b)
=[(3a-4b)-(11a+2b)]·(7a-8b)
=(3a-4b-11a-2b)·(7a-8b)
=(-8a-6b)(7a-8b)
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