#### Answer

$10$

#### Work Step by Step

$(3 - i)(3+i) = 9 +3i - 3i - i^2 = 9 - (-1) = 10$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$10$

$(3 - i)(3+i) = 9 +3i - 3i - i^2 = 9 - (-1) = 10$

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.