# Key Terms Chapter 09: Quadratic Equations and Functions

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Example and Directions
Words (or words that have the same definition)The definition is case sensitive(Optional) Image to display with the definition [Not displayed in Glossary, only in pop-up on pages](Optional) Caption for Image(Optional) External or Internal Link(Optional) Source for Definition
(Eg. "Genetic, Hereditary, DNA ...")(Eg. "Relating to genes or heredity")The infamous double helix https://bio.libretexts.org/CC-BY-SA; Delmar Larsen
Glossary Entries
discriminantIn the Quadratic Formula, $$x=\frac{-b±\sqrt{b^2-4ac}}{2a}$$, the quantity $$b^2-4ac$$ is called the discriminant.
quadratic functionA quadratic function, where $$a$$, $$b$$, and $$c$$ are real numbers and $$a≠0$$, is a function of the form $$f(x)=ax^2+bx+c$$.