如果m-n=-50,70+2m-2n=
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
如果m-3n+4=0 求(m-3n)^2+7m^3-3(2m^3n-m^2n-1)+3(m^3+2m^3n-m^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))
如果m:n=4,那么m和n成______;如果5m=n,那么m和n成______;如果m/n=1/2那么m和n成____
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n
先化简,在求值(m+n)(m-n)(-m^2-n^2)-(-2m+n)(-2m-n)(4m^2+n^2) 其中m=1,n
已知:m*m=n+2,n*n=m+2.求m*m*m-2mn+n*n*n(m不等于n).
如果|m|=3,则m=( ),如果|n-2|=0,则n( )
m,n,(2m-1)/n,(2n-1)/m为正整数,m,n>=2.求m,n
2x+n/m=m/n-(m/n+n/m)x(m+n不等于0)