Let f (x) = X-2 / x-alnx. When a = 3, find the extremum of FX

Let f (x) = X-2 / x-alnx. When a = 3, find the extremum of FX

F (x) = X-2 / x-alnx
f(x)=x-2/x-3lnx.
f’(x)=1+2/x²-3/x=(.x²-3x+2)/x²
If f '(x) > 0, then x2
And x > 0
f’(x)