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(6m的平方-4m-3)+(2m的平方-4m+1)怎么算?
人气:101 ℃ 时间:2019-12-22 19:24:45
解答
(6m^2-4m-3)+(2m^2-4m+1)
=6m^2-4m-3+2m^2-4m+1
=8m^2-8m-2
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