By Ben Oyler, Jerred Montgomery, and Anthony Morgan

 A rational expression is an algebraic expression whose numerator and denominator are polynomials. The value of the polynomial expression in the denominator cannot be zero since division by zero is undefined. This means that rational expressions, like rational functions may have excluded values. Source: Holt Algebra 1 Textbook, page 642 What Is This?

 1. Factor out everything the terms have in common. 2. Cancel out the common factor. The Steps

 Example And Answer