1. The problem statement, all variables and given/known data Hello PF, I am taking calculus II right now, and a homework problem I came to ponder upon has been giving me big trouble today. Here is the what I have to take the integral of: ∫x/(x^(2)+8x)^(1/2) dx Every other trig substitution problems were straight forward, as all I had to do was identify what trig identity I could use. But this time, I have no idea where to start from. 2. Relevant equations 3. The attempt at a solution In wishful thinking I set substitution for x=(8^(1/2))tan(t), but as expected it didn't work out after. Help would be greatly appreciated!