#### Answer

$13$

#### Work Step by Step

Use the FOIL method to multiply the binomials.
$4-6i+6i-9i^2$
Substitute $-1$ for $i^2$. Also, add/subtract like terms.
$4-9(-1)$
Simplify.
13

Published by
Pearson

ISBN 10:
0321671791

ISBN 13:
978-0-32167-179-0

$13$

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