题目内容
计算:3a2b﹣{2ab2+
[5a3﹣
(﹣6a2b+4a3)+6a2b]}.
解:3a2b﹣{2ab2+
[5a3﹣
(﹣6a2b+4a3)+6a2b]}
=3a2b﹣{2ab2+
[5a3+3a2b﹣2a3+6a2b]}
=3a2b﹣2ab2﹣2a3﹣6a2b
=﹣3a2b﹣2ab2﹣2a3.
=3a2b﹣{2ab2+
=3a2b﹣2ab2﹣2a3﹣6a2b
=﹣3a2b﹣2ab2﹣2a3.
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