#### Answer

$3b^{2}$

#### Work Step by Step

Step 1: $\frac{3}{b^{-2}}$
Step 2: $3\times\frac{1}{b^{-2}}$
Step 3: $3\times b^{2}$
Step 4: $3b^{2}$

Published by
Brooks Cole

ISBN 10:
0-53449-636-9

ISBN 13:
978-0-53449-636-4

$3b^{2}$

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