{9m+2n=15} {3m+4n=10}

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)= 若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n)/[4(2m+n)]}的值是? .4（m+n)^2*（m+n)^3-7（m+n)（m+n)^4+5（m+n)^5= (m-n)^3(n-m)^2(m-n)=_____ {9m+2n=15} {3m+4n=10} (m-n)^2*(m-n)^4=? (3m-n)(m-2n)=() 推数学函数关系式n=2 n=3 n=4 n=5 n=6m=1 m=3 m=6 m=10 m=15用含n表示m 已知m^2+9n^2+6m+6n+10=0,求(m^2-6mn+9n^2)/(m-3n)-(4m^2-9n^2)/(2m-3n) 以知m^2+9n^2+6m+6n+10=0,求(m^2-6mn+9n^2)除以(m-3n)-(4m^2-9n^2)除以(2m-3n)的值 已知m^2+9n^+6m+6n+10=0,求(m^2-6mn+9n^2)÷(m-3n)-(4m^2-9n^2)÷(2m-3n)的值 2m-3n/3m+5n=3 则(4m-6n/18m+30n)+9m+15n/4m-6n的值是多少 已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n－15(2m+n)/m-2n－2 (m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1 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 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?