(负二分之一ab)(三分之二ab²-2ab+三分之四b+1)
人气:359 ℃ 时间:2020-10-02 02:32:43
解答
(负二分之一ab)(三分之二ab²-2ab+三分之四b+1)
=-1/3a²b³+a²b²-2/3ab²-1/2ab
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