Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Review Exercises - Page 431: 64


$x=-1$ (multiplicity 2) and $x=4$ (multiplicity 2) $g(x)=(x-4)^2(x+1)^2$

Work Step by Step

Step 1. List the possible rational zeros: $\frac{p}{q}=\pm1,\pm2,\pm4,\pm16$ Step 2. Start with easy numbers; use synthetic division to test for zeros as shown in the figure. We have: $x=-1,4$ Step 3. With the quotient $x^2-3x-4=(x-4)(x+1)$, we have $g(x)=(x-4)^2(x+1)^2$ Step 4. We conclude that the zeros are $x=-1$ (multiplicity 2) and $x=4$ (multiplicity 2).
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