Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 1 - Precalculus Review - 1.5 Technology: Calculators and Computers - Exercises - Page 35: 2

Answer

Only one root $x\approx-2.65$

Work Step by Step

By using the Maple program, we can graph the function $y=x^3-4x+8$ and calculate its roots by observing where the graph crosses the x-axis. We have only one root: $x=-2.65$. See the graph below.
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