College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 4 - Section 4.5 - Inequalities involving Quadratic Functions - 4.5 Assess Your Understanding - Page 315: 47



Work Step by Step

We know that $i^2=-1$. Thus here: $(6-5i)(4-i)=6\cdot4-6i-20i+5i^2=24-26i+5(-1)=19-26i$
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