(m+5n)(m-5n)-(m-2n)(3m-4n)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
一道数学题m+n/2+m-n/3=6 ,4(m+n)-5(m-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)
(3m-4n)(4n+3m)-(2m-n)(2m+n)
(3m-4n)² -2m(m+n)
(5m+2n)(5m-2n)-(3m-4n)(4m+3n)
m-{n-2m+[3m-(6m+3n)-5n]}化简
已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n-15(2m+n)/m-2n-2
若5m-3n=-4,求出2(m-n)+4(2m-n)
2m-{n+[4m-3(m+2n)]}-5n化简求值
计算题:(1) 5(m+n)(m--n)--2(m+n)(m+n)--3(m-n)(m--n)
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值