1. The problem statement, all variables and given/known data Find the maximums, minimums, and saddle points (if any) of Z = 4Y3 + X2 - 12Y2 - 36Y +2 2. Relevant equations The partial derivatives with respect to X , and Y. 3. The attempt at a solution I took the two partials, and set them equal to zero. The problem is that there is not anything to substitute, and when I tried solving them there was no solution.