#### Answer

$(9b)^2$

#### Work Step by Step

$81b^2 = 9^2b^2 = (9b)^2$

Published by
Pearson

ISBN 10:
0321726391

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

$(9b)^2$

$81b^2 = 9^2b^2 = (9b)^2$

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