1. The problem statement, all variables and given/known data Compute dv/dx and for v = [12xy-(x^2)(y^2)]/[2(x+y)] 3. The attempt at a solution I attemptet to solve this problem just reading over partial derivatives for the first time and get the following answer: dv/dx (6y-xy^2)/(x+y)^2 let's say I take out the numerator and just took the partial derivative of it: i.e (dv/dx)(12xy-(x^2)(y^2)) would the partial derivative be = 12y-2xy^2 ? the book however gives the following answer without going through any steps because it is part of a larger problem. dv/dx = [(y^2)(12-2xy-x^2)]/[2(x+y)^2] I am confused because this answe is very different from mine and I can't trace my steps where I messed up. Please help!