Answer
$61$
Work Step by Step
Step 1: $(6+5i)(6-5i)$
Step 2: $6(6)+6(-5i)+5i(6)+5i(-5i)$
Step 3: $36-30i+30i-25i^{2}$
Step 4: $36-25i^{2}$
Step 5: Since $i^{2}=-1$, we get
$36-25(-1)$.
Step 6: $36+25$
Step 7: $61$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.7 - Complex Numbers - Practice - Page 736: 15
Update this answer!
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.
