## Algebra and Trigonometry 10th Edition

$l^2-x^2=225$
$l$ 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 $x$: $l^2=x^2+15^2$ $l^2=x^2+225$ $l^2-x^2=225$