Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 5 - Polynomials and Factoring - 5.7 Solving Quadratic Equations by Factoring - 5.7 Exercise Set - Page 353: 86



Work Step by Step

In order to solve this equation, we simplify until the variable is isolated on one side of the equation. Doing this, we find: $$ x^3+4x^2-9x-36=0\\ \left(x+4\right)\left(x+3\right)\left(x-3\right)=0 \\ x=-4,\:x=-3,\:x=3$$
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