-m^2+2m=4n-n^2+2n=4m求m和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和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
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/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
已知-m²+2m=4n,-n²+2n=4m,求m/n的值
m+2n=2,3m+4n=8,求m+n=几
m+2n=2且3m+4n=8,求m+n
{-3/2m+n=4 {2m+n=-3 求m,n 注意,
m^+4m+n^-2n+5=0,求4m+5n=?
m平方+2M+N平方-4N+5=0,求M,N
已知:m*m=n+2,n*n=m+2.求m*m*m-2mn+n*n*n(m不等于n).