# Key Terms Chapter 07: Rational Expressions 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
rational expressionA rational expression is an expression of the form $$\frac{p}{q}$$, where $$p$$ and $$q$$ are polynomials and $$q≠0$$.
rational functionA rational function is a function of the form $$R(x)=\frac{p(x)}{q(x)}$$ where $$p(x)$$ and $$q(x)$$ are polynomial functions and $$q(x)$$ is not zero.
simplified rational expressionA simplified rational expression has no common factors, other than $$1$$, in its numerator and denominator.