Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - 1.4 - Quadratic Equations and Applications - 1.4 Exercises - Page 113: 119a



Work Step by Step

$l$ is the hypotenuse, while $x$ and the 15 foot side are the legs of the right triangle. Use the Pythagorean Theorem to write an equation connecting $l$ and $x$: $l^2=x^2+15^2$ $l^2=x^2+225$ $l^2-x^2=225$
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