{m+n/3-m-n/4=-0.46,3/4m+4n=-2.59(解方程组）

m-[n-3m-(m-n)]=? 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= (m-2n)(2n+m)-(-3m-4n)(4n-3m)= |m-n|=n-m,且|m|=4,|n|=3,则m+n=? |m-n|=n-m,且|m|=4,|n|=3,求（m+n)*(m+n)的值 .4（m+n)^2*（m+n)^3-7（m+n)（m+n)^4+5（m+n)^5= 4m(m-n)^2+4n(n-m)^3 [(m-n)^2*(m-n)^3]^2/(m-n)^4 [(m-n)^2*(m-n)^3]^2/(m-n)^4 （m-n)2(n-m)3(n-m)4化简 (m-n)^3(n-m)^2(m-n)=_____ m/n=7/3则m+n/m-n (3m-n)(m-2n)=() (m+n)^4+m(m+n)^3+n(n-m)^3 因式分解错了错(m-n)^4+m(m+n)^3+n(n-m)^3 因式分解 如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n= 如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少 (m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?