Answer
$x^{2}+x$
Work Step by Step
Let x be a natural number. The next natural number would be x+1. Multiply Them to get
x(x+1) = $x^{2}+x$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.3 - Modeling with Linear Equations - 1.3 Exercises - Page 97: 14
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