Question: Graph each polynomial function in the viewing window specified. Then approximate the real zeros to as many decimal places as the calculator will provide. (x)

Graph each polynomial function in the viewing window specified. Then approximate the real zeros to as many decimal places as the calculator will provide.

ƒ(x) = x⁴ - 4x³ - 5x² + 14x - 15; window: [-10, 10] by [-60, 60]

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