A cubic polynomial is a polynomial of degree 3. A univariate cubic polynomial has the form 
.
An equation involving a cubic polynomial is called a cubic
equation. A closed-form solution known as the cubic
formula exists for the solutions of an arbitrary cubic
equation.
Cubic Polynomial
See also
Casus Irreducibilis, Cubic Equation, Cubic Formula, Perfect Cubic PolynomialPortions of this entry contributed by David Terr
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Cite this as:
Terr, David and Weisstein, Eric W. "Cubic Polynomial." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CubicPolynomial.html