Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 5 - Section 5.5 - Solving Equations by the Zero-Factor Property - 5.5 Exercises - Page 355: 4


$x=\{ -7,-3 \}$

Work Step by Step

$\bf{\text{Solution Outline:}}$ To solve the given equation, $ (x+7)(x+3)=0 ,$ use the Zero-Factor Property by equating each factor to zero. Then solve each equation. $\bf{\text{Solution Details:}}$ Equating each factor of the equation above to zero (Zero-Factor Property), then \begin{array}{l}\require{cancel} x+7=0 \text{ OR } x+3=0 .\end{array} Using the properties of equality to solve each of the equation above results to \begin{array}{l}\require{cancel} x+7=0 \\\\ x=-7 \\\\\text{ OR }\\\\ x+3=0 \\\\ x=-3 .\end{array} Hence, the solutions are $ x=\{ -7,-3 \} .$
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