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Rationalizing a Denominator with a Binomial - Problem 5 315 views

As with any fractions, if we wish to add or subtract, we'll need to have common denominators. With radical binomial denominators, like here, we'll multiply each fraction top and bottom by the other fraction's denominator. In this example, the radicals all become real numbers in the bottom, so we only need to be careful with distributing the subtraction sign and simplifying the numerator. You can use a calculator to check your solution.

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