I'll just make one thread for all the help I'll need with derivatives so I don't clutter up this forum. 1. The problem statement, all variables and given/known data Find the derivative of y = sqrt(x)(x - 1). 2. Relevant equations Wolfram Alpha gets this: http://www.wolframalpha.com/input/?i=derivative+y+=+sqrt(x)(x+-+1) I got sqrt(x) + [(x - 1) / (2sqrt(x))]. Which is basically everything up until the point where Wolfram returns the answer. I don't understand where the 3 in the numerator comes from, or where the sqrt(x) that's being added goes. 3. The attempt at a solution All the work you see Wolfram doing, up until the point Wolfram returns the answer.