Answer
$0, -21$
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:
$n+21=0$
$n=-21$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
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
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