1. The problem statement, all variables and given/known data The problem reads(from the 4th edition of Stewart Calculus "Concepts and Contexts" pg. 394 #17): Evaluate the integral. the indefinite integral of dx/x^2*sqrt(4-x^2) so this would read out as "the indefinite integral of dx over x squared times the square root of 4 minus x squared" 2. Relevant equations 3. The attempt at a solution I tried everything I know. I have been stuck on this problem for over 2 hours now and I just cant see what to do. The back of the book says the answer is -sqrt(4-x^2)/4x the frustrating thing is that using substitution I am getting to -sqrt(4-x^2)/x so I feel like I'm pretty close, or just have some careless mistake somewhere I am missing.