Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 3 - Quadratic Functions - Exercises for Skills for Factoring - Page 135: 82

Answer

$$ n=5,\:n=-2,\:n=2$$

Work Step by Step

Solving the equation, we find: $$ n^5-5n^4-16n+80=0 \\ \left(n-5\right)\left(n^2+4\right)\left(n+2\right)\left(n-2\right)=0 $$ Considering only the real solutions: $$ n=5,\:n=-2,\:n=2$$
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