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Home > PC3 > Chapter 1 > Lesson 1.2.1 > Problem 1-72


In this course, you will need to rationalize the denominator (make the denominator a rational number) of fractions with radicals in the denominator. Before calculators, there was good reason to rationalize denominators—all calculations had to be done by hand. Consider dividing by , or . What about dividing by , or ? Since was a more useful form, it became the standard form. Use the following method to rationalize the denominator of each radical expression below:

  1. This is the same as the example, but with a numerator of .