Find a degree 4 polynomial with real coefficients that has zeros of -1, 3, 2i, such that f(2)= 48. f(x)=-2 (x +1) (x − 3)(x²

Question

Find a degree 4 polynomial with real coefficients that has zeros of -1, 3, 2i, such that f(2)= 48.
f(x)=-2 (x +1) (x − 3)(x² + 4)
f(x) = (x + 1)(x - 3) (x² + 4)
f(x) = 1/2(x + 1)(x - 3) (x² + 4)
Of(z) = 2 (x +1) (x − 3)(x² + 4)

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