Question: How Do I solve this? Find all points (x,y) where f(x,y) has a possible relative maximum or minimum. f(x,y) = 4x3 + 5x2y - 20y

How Do I solve this?

How Do I solve this? Find all points (x,y) where f(x,y) has

Find all points (x,y) where f(x,y) has a possible relative maximum or minimum. f(x,y) = 4x3 + 5x2y - 20y Using only the first-derivative test for functions of two variables, find all the points that are possibly a relative maximum or a relative minimum. (Type an ordered pair. Type an exact answer. Use a comma to separate answers as needed.)

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