Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 6 - Radical Functions and Rational Exponents - 6-1 Roots and Radical Expressions - Practice and Problem-Solving Exercises - Page 364: 10


$-15$ and $15$

Work Step by Step

Note that $15^2=225$, so $15$ is a real square root of 225, and $(-15)^2=225$, so $-15$ is a also real square root of 225. Thus, the real square roots of 225 are 15 and -15.
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