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化简m-(m^2×n+3m-4n)+(2nm^2-3n)
人气:464 ℃ 时间:2019-12-13 17:55:51
解答
m-(m^2×n+3m-4n)+(2nm^2-3n)
=m-nm^2-3m+4n+2nm^2-3n
=-2m+nm^2+n
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