Answer
$x^2+y^2=9$
Work Step by Step
$(x-h)^2+(y-k)^2=r^2$
$h=0$, $k=0$ and $r=3$:
$(x-0)^2+(y-0)^2=3^2$
$x^2+y^2=9$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.1 - Graphs of Equations - 1.1 Exercises - Page 79: 59
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