## Algebra: A Combined Approach (4th Edition)

Published by Pearson

# Chapter 10 - Section 10.5 - Rationalizing Numerators and Denominators of Radical Expressions - Exercise Set - Page 718: 63

#### Answer

$\sqrt 7$ must be multiplied by $\sqrt 7$ to make the denominator 7, a rational number. When either the numerator or the denominator is multiplied by a particular factor, the other number must be multiplied by the same factor to make sure that the numerical value of the fraction does not change.

#### Work Step by Step

When either the numerator or the denominator is multiplied by a particular factor, the other number must be multiplied by the same factor to make sure that the numerical value of the fracion does not change.

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