(3m-n+2)(3m-n-2)和2011^2-2010×2012
因式分解2m^2012 (m-n)^2 -3m^2011 n(n^2-m^2)
[(m-n)^2*(m-n)^3]^2/(m-n)^4
(m-n)2(n-m)3(n-m)4化简
计算(m+n)^3-(n+m)(m-n)^2
(n-m)^3×(m-n)^2-(m-n)^5
因式分解(n-m)^3(m-n)^2-(m-n)^5
3m(m-n)-2n(m-n)的平方
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
m+n=3,m·n=-2,求m和n的值
(2m+3n)(2m-3n)-(3m-2n)(3m+2n)