## Precalculus (6th Edition)

Published by Pearson

# Chapter 1 - Equations and Inequalities - 1.6 Other Types of Equations and Applications - 1.6 Exercises - Page 145: 4

#### Answer

$\text{original equation}$

#### Work Step by Step

When both sides of an equation is raised to a power to solve the equation, then the answers must be checked in the original equation as some of the proposed solutions might be extraneous ('solutions' that will not satisfy the original equation). Thus, the missing expression in the given statement is: $\text{original equation}$

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