Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 7 - Algebraic Fractions - Chapters 1-7 Cumulative Review Problem Set - Page 324: 47



Work Step by Step

First we isolate the unknown variable, $5n^{2}-5=0$ $5n^{2}=5$ $n^{2}=\frac{5}{5}$ $n^{2}=1$ Next, we apply square root to both sides of the equation and solve: $\sqrt {n^{2}}=\pm\sqrt 1$ $n=\pm\sqrt 1$ $n=\pm 1$ Therefore, the solution set is {$-1,1$}.
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