1. The problem statement, all variables and given/known data 2x^3 - 8xy + y^2 = 1 2. Relevant equations 3. The attempt at a solution d2x^3/dx - d8xy/dx + dy^2/dx = d1/dx 6x^2 -8(y) + dy/dx(-8x) + 2y(dy/dx) = 0 6x^2 - 8y -8x(dy/dx) + 2y(dy/dx) = 0 I am stuck and can't seem to go further. Someone help?