Re-write the integrand as sqrt(x)-[3/sqrt(x)].
The antiderivative is (2/3)x3/2 - 6x1/2
You plug in the limits of integration to get the answer.
P.S. Just to look "nice", you might have written your problem as: the integral from 1 to 9 of the integrand
(x-3) divided by the sqrt(x).