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化简a+1分之a的三次方-a+1分之a=?
人气:398 ℃ 时间:2020-04-07 15:09:17
解答
原式=a³-a/a+1
=a(a²-1)/a+1
=a(a-1)(a+1)/a+1
=a(a-1)
=a²-a
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