#### Answer

$-15$ 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.

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

$-15$ and $15$

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