(m-n):n=2:3则m:n=_:_
若m+n=0,n=-3则m=_
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
把多项式X^2-4X-M分解因式得(x-5)(X-N),则M=_,N=_
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n
多项式x∧2+mx+5因式分解得(x+5)(x+n)则m=_,n=_
已知m的2次方+n的2次=6,则代数式(3m的2次方-4n的2次方-mn)-(4m的2次方-3n的2次方-mn)的值是_
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
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=_______?
m+2n=2,3m+4n=8,则m=?,n=?
代数式2m=3n,则m/(m+n)-m/(m-n)-2n^2/(m^2-n^2)=