(5m+2n)(5m-2n)-(3m-4n)(4m+3n)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
(3m-4n)(4n+3m)-(2m-n)(2m+n)
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)
(5m+2n)(5m-2n)-(3m-4n)(4m+3n)
若5m-3n=-4,求出2(m-n)+4(2m-n)
2m-{n+[4m-3(m+2n)]}-5n化简求值
先化简再计算:(m+n)2-4 (m+n)(m-n)+3(m-n)2,其中m=5,n=-45
m-{n-2m+[3m-(6m+3n)-5n]}化简
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
m-{3n-4m+[m-5(m-n)+m]}=______.
[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]