**Chapter 9Rational Functions and Relations**

9.1 Simplify, Multiply, and Divide Rational Expressions

9.2 Add and Subtract Rational Expressions

9.3 Simplify Complex Rational Expressions

9.4 Rational Equations

9.5 Graph Rational Functions

9.6 Variation Functions

**9.1 Simplify, Multiply, and Divide Rational Expressions**

Recall that a rational number is a number that can be written as a ratio of two integers, or a fraction where the numerator and denominator are integers. A *rational expression* is the ratio of two polynomials, or a fraction where the numerator and denominator are polynomials. Recall that a polynomial is a general term that can refer to a monomial or an expression with many terms.

**Examples of Rational Expressions**

The last example, –3