# Chapter P - Prerequisites: Fundamental Concepts of Algebra - Concept and Vocabulary Check: 9

the conjugate of the rational expression's denominator, $\sqrt{10} + \sqrt2$

#### Work Step by Step

As demonstrated on page 41; We rationalize the denominator of $\frac{5}{\sqrt{10} - \sqrt2}$ by multiplying the numerator and denominator by the conjugate of the rational expression's denominator, $\sqrt{10} + \sqrt2$.

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