I'm stuck on intergrating a function. the function is (x-2)/(x^2-4x+5)^.5. The problem states that we are to use (x-2)^2 as u for subsition. So i took the derivative of (x-2)^2 and plugged du into the intergal. Then I'm stuck. I have .5*the intergal of du/(u+1)^.5. I don't know what to do after that. Any help?