1. The problem statement, all variables and given/known data Find the global max/min for z=xy^2 - 5 on the region bounded by y=x and y=1-x^2 in the xy-plane. 2. Relevant equations 3. The attempt at a solution I found the critical point of z=xy^2 - 5 at (0,0), but I do not know how to relate this to the boundary.