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因式分解(3m+2n)的二次方-(3m-2n)的二次方-60m
人气:103 ℃ 时间:2019-12-20 03:56:20
解答
(3m+2n)^2-(3m-2n)^2-60m
=(3m+2n+3m-2n)(3m+2n-3m+2n)-60m
=6m*4n-60m
=24mn-60m
=12m(2n-5)
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