Rational Expressions.

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Rational Algebraic Expressions

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Presentation transcript:

Rational Expressions

A rational expression is a fancy word for algebra in fractions. The same concepts that apply to fractions apply to rational expressions. If there is a letter in the denominator, it cannot equal zero.

Key Concepts of Fractions Concept #1: You can only compare or combine (+ or -)two fractions that are the same “kind” or have the same denominator. Concept #2: Multiplying or dividing by one does not change the value of a fraction. It is important to remember that the denominator (bottom) tells what kind and the numerator (top) tells how many.