Use Taylor's formula for f(x,y) at the origin to find quadratic and cubic approximations of f(x,y) = 2x²y near the origin. The quadratic approximation of f(x,y) is 2x + xy

A path of a toy rocket thrown upward from the ground at a rate of 208 ft/sec is modeled by the quadratic function of. h(x)=16t2+208t. When will the rocket reach its maximum height? What will be the maximum height?