3m-4n/2*3m+4n/3*9m的平方+16n的平方/6
=(9m^2-16n^2)/6*(9m^2+16n^2)/6
=(81m^2-256n^2)/36
3m-4n/2*3m+4n/3*9m的平方+16n的平方/6
3m-4n/2*3m+4n/3*9m的平方+16n的平方/6
数学人气:469 ℃时间:2019-09-26 14:35:11
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