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: $n+21=0$ $n=-21$
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.