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化简1/6m-4n-1/6m+4n-3m/4n^2-9m^2
人气:235 ℃ 时间:2020-03-30 10:36:16
解答
原式=(3m+2n-3m+2n+6m)/2(3m+2n)(3m-2n)
=2(3m+2n)/2(3m+2n)(3m-2n)
=1/(3m-2n)
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