3a+2b+[3b+2b+﹙a-b﹚]+﹙3a+2b-2a﹚=?写过程

2025-02-24 23:04:39
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回答1:

3a+2b+[3b+2b+﹙a-b﹚]+﹙3a+2b-2a﹚=3a+2b+3b+2b+a-b+3a+2b-2a=(3a+a+3a-2a)+(2b+3b+2b-b+2b)=5a+8b