Cubic Roots- Cardano and the Extended Quadratic Equation

Finding Cubic Polynomial roots using an abridged application of Cardano’s formula with the ‘Extended Quadratic Equation’

Greg Oliver
5 min readJun 10, 2022

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This post offers a 2 formula tool-kit to finding exact Cubic Polynomial roots using Cardano’s formula for 1 root and the Extended Quadratic Equation for the other 2…

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Greg Oliver

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