Let m⋆n=m/n+n/m for all integers m, n≠0 If m^2+n^2=8 and mn=4, what is the value of m⋆n?
m/n + n/m =
[ m^2 + n^2 ] / mn
Now just fill in what we know
[ 8 ] / [ 4 ] = 2 = m + n
