Precalculus (6th Edition)

by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 013421742X

ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - Summary Exercises on Graphs, Circles, Functions, and Equations - Exercises - Page 248: 19

Answer

center $(6,0)$, radius $r=4$

Work Step by Step

Rewrite the equation and form squares of $x,y$, we have $x^2-12x+36+y^2=36-20\longrightarrow (x-6)^2+(y)^2=16$. Thus, the equation represents a circle with center at $(6,0)$ and radius $r=4$

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