Good afternoon,

I am hoping someone can give me a nudge in the right direction. I have the following problem:

$\displaystyle \int{\frac{ln(x)^2dx}{x^2}}$

First use substitution, then use integration by parts.

What is the proper way to handle this via substitution?

$\displaystyle u = ln(x) , du = \frac{1}{x}$ ?

$\displaystyle u = ln(x)^2 , du = \frac{1}{x^2}$ ?