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(m-2n)平方乘以(m+2n)平方等于
人气:466 ℃ 时间:2020-06-19 21:19:10
解答
(m-2n)²(m+2n)²
=[(m-2n)(m+2n)]²
=(m²-4n²)²
=m^4-8m²n²+16n^4
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