Precalculus (6th Edition) Blitzer

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

Chapter 2 - Mid-Chapter Check Point - Page 381: 20

Answer

$x=3, 1\pm\sqrt 2$; see graph.

Work Step by Step

Step 1. List possible rational zeros: $\frac{p}{q}=\pm1,\pm3$ Step 2. Test with synthetic division to find a zero at $x=3$, as shown in the figure. Step 3. The function becomes: $f(x)=-(x-3)(x^2-2x-1)$ Thus the zeros are $x=3, 1\pm\sqrt 2$ Step 4. Graph the function as shown in the figure.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.