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m^2+4m^3-4-16m
人气:351 ℃ 时间:2020-06-17 11:56:33
解答
m^2+4m^3-4-16m
=m^2(1+4m)-4(1+4m)
=(1+4m)(m^2-4)
=(1+4m)(m+2)(m-2)
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