If M and N are opposite numbers, then the value of 1 / 2m ^ 2 + Mn + 1 / 2n ^ 2 is______

If M and N are opposite numbers, then the value of 1 / 2m ^ 2 + Mn + 1 / 2n ^ 2 is______

1/2m^2+mn+1/2n^2
=1/2(m^2+2mn+n^2)
=1/2(m+n)²
Because m and N are opposite numbers, M + n = 0
So = 1 / 2 (M + n) & sup2;
=0
If M and N are opposite numbers, then the value of 1 / 2m ^ 2 + Mn + 1 / 2n ^ 2 is__ 0____