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    Cubic equation roots

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    This is a bonus question I'm working on for an exam coming up.

    Find the exact root of X^3 + X -1 = f(x). I need to find it in the format:

    The exact root of X^2-x-1=0 is x=1+ or - the square root of 5 divided by 2. (Not a decimal or regular fractional number.)

    I got all the others, but I just can't get this one.

    © BrainMass Inc. brainmass.com March 4, 2021, 6:27 pm ad1c9bdddf
    https://brainmass.com/math/basic-algebra/cubic-equation-roots-45608

    Solution Summary

    This shows how to use Cardano's formula to find exact roots of a cubic equation.

    $2.49

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