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计算题 (2m-3n)^2(2m+3n)^2
人气:267 ℃ 时间:2020-05-16 15:55:59
解答
(2m-3n)^2(2m+3n)^2 =(2m-3n)(2m+3n)(2m-3n)(2m+3n) =(4m^2-9n^2)^2
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