(2m+3n)(2m-3n)-(3m-2n)(3m+2n)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
计算(3-m+n)*(3+m-n)-(2-m+n)*(2+m-n)
(3m-4n)(4n+3m)-(2m-n)(2m+n)
m-{n-2m+[3m-(6m+3n)-5n]}化简
已知|2m-n/m+2n|=3,求2(2m-n)/m+2n-2m-n/m+2n-3的值
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
计算题:(1) 5(m+n)(m--n)--2(m+n)(m+n)--3(m-n)(m--n)
(3m+2n)^2-(m-n)^2
(4(m-n)^3)/((n-m)^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)
设不等式(m+n)x+(2m-3n)
(2m+3n)(2m-3n)-(3m-2n)(3m+2n)