Consider the following function. F(x) = x^4 + x^3- 20x^2 Find all values of x such that f(x) > 0. (-00, -5) U (4, 00) [-5, 0) U (0, 4) (-5, 4) (-5, 0) U (0, 4) (-00, -5) U [4,00) Find all values of x such that f(x) < 0. (-00, -5) U [4, 00) (-00, -5) U (4, 00) (-5, 4) [-5, 0) U (0, 4) (-5, 0) U (0, 4) How do you solve this?

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