Answer
3
Work Step by Step
Using the equation for the area of a square and factoring:
$$ 36 = (2x)^2 \\ 36=4x^2 \\ 9=x^2 \\ x=3$$
**Note, we only consider the positive solutions since length cannot be negative.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 4 Quadratic Functions and Factoring - 4.4 Solve ax(squared) + bx + c = 0 by Factoring - 4.4 Exercises - Skill Practice - Page 264: 50
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