A quadratic polynomial is a polynomial of degree 2. A univariate quadratic polynomial has the form 
.
An equation involving a quadratic polynomial is called a quadratic
equation. A closed-form solution known as the quadratic
formula exists for the solutions of an arbitrary quadratic
equation.
Quadratic Polynomial
See also
Quadratic, Quadratic Equation, Quadratic FormulaPortions of this entry contributed by David Terr
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Cite this as:
Terr, David and Weisstein, Eric W. "Quadratic Polynomial." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/QuadraticPolynomial.html