Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 10 - Quadratic Equations - 10.1 - Quadratic Equations - Problem Set 10.1 - Page 442: 4


$0, -21$

Work Step by Step

In order to solve a quadratic equation, we factor so that we can find when x equals 0. Thus, we obtain: $n^2+21n=0$ $n(n+21)=0$ Solution 1: $n=0$ Solution 2: $n+21=0$ $n=-21$
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