SOLUTION: find all the zeros of a polynomial function. Find all the zeros or roots of the given function 4x^3-16x^2-3x+45

Question 906504: find all the zeros of a polynomial function. Find all the zeros or roots of the given function 4x^3-16x^2-3x+45
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find all the zeros of a polynomial function. Find all the zeros or roots of the given function 4x^3-16x^2-3x+45
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I graphed it and found a zero at x = 3
3)....4....-16....-3....45
.......4....-4....-15..|..0
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Solve 4x^2 -4x -15
(2x+3)(2x-5)
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Answers::
x = -3/2 ; x = 5/2 ; x = 3
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Cheers,
Stan H.
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