Could someone assist on the two problems below?

1. Find the anti-derivative by parts:

ln3x/x^2 I get the following answer: -1/x*ln3x-1/2x^2 + C

2. Solve by substitution:

x*(x-3)^1/2 If I use u=(x-3)^1/2 I don't know how to get rid of the first x

Any help will be appreciated.