作业帮(m-n)3-(2n-m)3
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(m-n)3-(2n-m)3
(m-n)3-(2n-m)3
(m-n)3-(2n-m)3
(m-n)3-(2n-m)3
＝﹙m－n－2n＋m﹚[﹙m－n﹚²＋﹙m－n﹚﹙2n－m﹚＋﹙2n－m﹚²]
＝﹙2m－3n﹚﹙m²－3mn＋3n²﹚
急急急急急急急急急
(m-n)³-(2n-m)³
=[(m-n)-(2n-m)][(m-n)²+(m-n)(2n-m)+(2n-m)²]
=(2m-3n)(m²-2mn+n²-2n²+3mn-m²+4n²-4mn+m²)
=(2m-3n)(m²-3mn+3n²)
[(m-n)^2*(m-n)^3]^2/(m-n)^4
[(m-n)^2*(m-n)^3]^2/(m-n)^4
3m(m-n)-2n(m-n)的平方
因式分解(n-m)^3(m-n)^2-(m-n)^5
（m-n)2(n-m)3(n-m)4化简
（n-m)^3×(m-n)^2-(m-n)^5
计算(m+n)^3-(n+m)(m-n)^2
(m-n)^3(n-m)^2(m-n)=_____
4m(m-n)^2+4n(n-m)^3
2(m-n)的2次-(m+n)(m-2n)-3n(n-m)
(m-n)3-(2n-m)3
2m-3n-m+2n
(3m-n)(m-2n)=()
(m+2n)(m-3n)
(m-3n)(2m+n)
约分(m-n)^2/(n-m)^3
分解因式(2m-n)(2m-n)(2m-n)+3n(n-2m)(n-2m)
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?