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计算:(-5n^a+1m)^2×(-2n)
人气:349 ℃ 时间:2019-10-29 19:42:19
解答
(-5n^a+1m)^2×(-2n)
=(5n^a+1m)^2×(-2n)
=25n^(2a+2)m^2×(-2n)
=-50n^(2a+3)m^2
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