Algebra and Trigonometry 10th Edition

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

Chapter 4 - 4.3 - Conics - 4.3 Exercises - Page 337: 2


circle $(h,k)$ $r$

Work Step by Step

We want all the points $(x,y)$ that are equidistant, $r$, from $(h,k)$: $d=\sqrt {(x-h)^2+(y-k)^2}~~$ (Square both sides and make $d=r$: $r^2=(x-h)^2+(y-k)^2$
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