1. The problem statement, all variables and given/known data ok, the original prob is : find the length of the curve of y=ln(1-x^2) x between 0, 1/2. 2. Relevant equations 3. The attempt at a solution ive made it this far: my integral is -1 + 2/1-x^2..............ok so i decompose the second part but in doing so i get a negative to make it -(x+1)(x-1) but i don't know what happens to that negative because the solution manual says the integral is .......-1+ 1/x+1 -1/x-1 dx i don't get the signs. please help!