Question: 13) Consider the function f(x) = -10x3 + 15x2 + 16x -12 a) Find all real zeros of f. b) Sketch a graph of f,

13) Consider the function f(x) = -10x3 + 15x2 + 16x -12 a) Find all real zeros of f. b) Sketch a graph of f, clearly labeling all intercepts. c) State the intervals for which the graph of f is positive or negative

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