College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.8 - Solving Basic Equations - P.8 Exercises: 60

Answer

$\left\{-5, 5\right\}$

Work Step by Step

Add $125$ to both sides: $5x^2=125$ Divide $5$ on both sides to obtain: $x^2=25$ Take the square root of both sides: $x=\pm \sqrt{25} \\x=\pm \sqrt{5^2} \\x=\pm 5$ Thus, the solution set of the given equation is $\left\{-5, 5\right\}$.
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