#### Answer

$9, -9$

#### Work Step by Step

Since $9^2 = 81$ and $(-9)^2=81$, the square roots of 81 are 9 and -9

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$9, -9$

Since $9^2 = 81$ and $(-9)^2=81$, the square roots of 81 are 9 and -9

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