Answer
$(z-8k)(z+2k)$
Work Step by Step
Step 1. Find factors of $-16$ as $(-8)(2)$ and the sum of the factors as $-8+2=-6$
Step 2. We have $z^2-6zk-16k^2=(z-8k)(z+2k)$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - Chapter R Test Prep - Review Exercises - Page 83: 65
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