Question the-fu

2.2 Nonlinear Equations in One Variable - Quadratic solving (factoring, quadratic formula, completing square)
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h of x equals, x cubed plus, a, x squared, plus b x, plus c

The function h is defined above, where a, b, and c are integer constants. If the zeros of the function are negative 5 6, and 7, what is the value of c ?

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