#### Answer

$ 4i + 3$

#### Work Step by Step

$(2+i)^2 = 2^2 + 2\times 2 \times i + i^2 = 4 + 4i + (-1) = 4i + 3$

Published by
Pearson

ISBN 10:
013421742X

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

$ 4i + 3$

$(2+i)^2 = 2^2 + 2\times 2 \times i + i^2 = 4 + 4i + (-1) = 4i + 3$

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.