已知m2-6m+9与｜n+1｜互为相反数,则m/m+n + n/m-n - m2/m2-n2 =

m2-6m+9与｜n+1｜互为相反数
所以,m2-6m+9+｜n+1｜=0
（m-3)^2+｜n+1｜=0
又（m-3)^2≥0 且｜n+1｜≥0
所以（m-3)^2=0 且｜n+1｜=0
m-3=0 且 n+1=0
m=3 且 n=-1
m/m+n + n/m-n - m2/m2-n2
=3/（3-1）+（-1）/(3+1)-9/(9-1)
=3/2-1/4-9/8
=1/8