1. The problem statement, all variables and given/known data Determine the second derivative of y with respect to x when 2x2+3y2=0 2. Relevant equations possible answers include: 2/(3y2) -2/(9y3) 2/(3y3) -2/(3y2) -2/(3y3) 3. The attempt at a solution I took the first derivative with respect to x implicitly and came up with -2x/3y I then took the second derivative, but here's where I get stuck. I wind up with: (-2y+2x(y'))/(3y^2) The only possible answers have only y in them, while I see no way to get rid of x in my solution. I've done this several times and come up with the same answer each time, what am I doing wrong?