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Algebra 1 Lesson #56 How to Rationalize the Denominator

http://www.greenemath.com/ In this lesson, we will learn how to rationalize the denominator. This process is part of the rules that state that we can't have a radical in the denominator. For simple problems, we can just multiply the numerator and denominator by the radical in the denominator. In other cases, such as cube roots or higher-level roots or binomial denominators, we will need to think carefully about how we can clear our denominator of any radicals.