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因式分解:4m^2-n^2-1+2n
人气:429 ℃ 时间:2020-01-26 19:53:54
解答
4m^2-n^2-1+2n
=4m^2-(n^2+1-2n)
=4m^2-(n-1)^2
=(2m+n-1)(2m-n+1)
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