若3m-2n-2=0,则4n-6m-3=
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n
若m^2+n^2-6n+4m+13=0则m-n=?
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
若m+n=0,则多项式m^3-m^3n-mn^2+n^3
若|m-n|+(m+2n-3)²=0,则m+n的值是
若m、n互为相反数,则(5m-3n)-(2m-6n)=
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
若m-n=3,3m+2n=2,求代数式6m(m-n)-4n(n-m)的值
若m×m+n×n-6n+4m+13=0,则m×m-n×n=?
已知2m+n分之m-2n=3,则2m+n分之3(m-2n)+3(2m+n)分之m-2n-4(2m+n)分之5(m-2n)
|m-n|=n-m,|m|=4|n|=3,则|(m+n)|^2=_______?
1,已知3m=4n,则m/m+n +n/m-n -m^2/m^2-n^2=