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Cubic Equation -- from Wolfram MathWorld

A cubic equation is an equation involving a cubic polynomial, i.e., one of the form

Since (or else the polynomial would be quadratic and not cubic), this can without loss of generality be divided through by , giving

A closed-form formula known as the cubic formula exists for the solutions of a cubic equation.

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Weisstein, Eric W. "Cubic Equation." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/CubicEquation.html

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