calc 3/multivariable calculus problem 22. Find the critical points of the function and use the Second…

calc 3/multivariable calculus problem
22. Find the critical points of the function and use the Second Derivative Test to determine whether each critical point corresponds to a relative maximum, a relative minimum or a saddle point. f(x,y) = x3 + 2xy – 2y2 – 10x