1. The problem statement, all variables and given/known data The the problem is integrate ln(sqrt(x^2-4) 2. Relevant equations For this one u-sub does not work, which leads me to think that integration by parts is the way to go but am not sure how to finish it. 3. The attempt at a solution u =1/2ln(x^2-4) du = (1/2)(2x/(x^2-4)) = x^2/(x^2-4) dv = dx ----> int dx = x = v x(1/2ln(x^2-4)) - int (x^2)/(X^2-4) I dont know what to do about the part in bold. Im thinking integration by part again but that doesnt look like it will work, unless there is one more integration to do. Any idea what i can try? Thanks!