Answer
We solve the polynomial inequality ${{x}^{2}}+8x+15>0$ by first solving the equation $f\left( x \right)=0$. The real solutions of the equation, -5 and -3, shown on the number line, are called boundary points.
Work Step by Step
See below:
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 2 - Section 2.7 - Polynomial and Rational Inequalities - Concept and Vocabulary Check - Page 412: 1
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