Cubic Polynomial 1st Roots — An Intuitive Method

A practical approach to finding the 1st roots, using Newton’s Approximation, and reducing trial and error.

Greg Oliver
Published in
6 min readMay 10, 2020

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Traditional ways of finding the 1st root of a cubic polynomial can require trial and error guesswork, along with lengthy calculations. The method I’ve shared below takes away some of that complexity.

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Greg Oliver

Melbourne Australia - retired engineer with a "Maths is Graphs" practical approach to understanding functions.