Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.4 Factoring Polynomials - R.4 Exercises: 14

Answer

$9z(z^3+9)$

Work Step by Step

Note that: $9z^4=9z(z^3) \\81z=9z(9)$ Thus, the greatest common factor is $9z$. Factor out $9z$ to obtain: $9z^4+81z=9z(z^3+9)$
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