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化简ab分之a²-b²-ab-a²分之ab-b²=
人气:486 ℃ 时间:2020-03-19 05:32:51
解答
原式=(a²-b²)/ab-b(a-b)/[-a(a-b)]
=(a²-b²)/ab+b/a
=(a²-b²)/ab+b²/ab
=(a²-b²+b²)/ab
=a²/ab
=a/b
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