Math

How do I go about finding the roots (real and complex) of this polynomial:

2x^3 + 7x^2 + 14x + 12

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  1. try x = ±1,±2,±3 ...
    f(1) ≠0
    f(-1) ≠0
    ...
    I could not find any zeros with integer values of x,
    so I tried some possible fractions and found
    x = -3/2 to work

    so it factors to (2x+3)((x^2 + 2x + 4) after a long division
    so x = -3/2 or x = -1 ± i√3

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    posted by Reiny

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