3m+4n=11 5m-6n=12怎么算
5(m-2n)方-3(m+n)+2(m+n)-8(m-2n)方,其中m=-10,n=-6时,怎么算
m-{n-2m+[3m-(6m+3n)+5n]}=
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m/n=5/3,求m/(m+n)+m/(m-n)-n平方/(m平方-n平方)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
m-{3n-4m+[m-5(m-n)+m]}=______.
集合M={m|m=3^n+6n-1,n∈N+,且m
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-[2m+(5m-2n)-3n]其中m=n分之一=2
若m×m+n×n-6n+4m+13=0,则m×m-n×n=?
已知m-n=6,求4(m-n)-3m+3n+8的值.