Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.8 - Inequalities - 1.8 Exercises: 102


$x=-5, 10$

Work Step by Step

The factors of the equation are $(x-10)$ and $(x+5)$. After setting each to $0$, $x$ is $10$ and $-5$. Plugging in each will give you the square root of $0$ which is $0$, a real number.
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