#### Answer

$(5a)^2$

#### Work Step by Step

$25a^2 = 5^2a^2 = (5a)^2$

Published by
Pearson

ISBN 10:
0321726391

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

$(5a)^2$

$25a^2 = 5^2a^2 = (5a)^2$

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