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计算:[3a²/(a+b)](a²-b²)÷[(b-a)/(a+b)]²
人气:259 ℃ 时间:2020-05-24 20:11:06
解答
[3a²/(a+b)](a²-b²)÷[(b-a)/(a+b)]²
=3a²(a-b)× (a+b)²/(a-b)²
=3a²(a+b)²/(a-b)
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