Precalculus (6th Edition)

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: 21

Answer

Not a circle.

Work Step by Step

Rewrite the equation and form squares of $x,y$, we have $x^2-2x+1+y^2=1-10\longrightarrow (x-1)^2+(y)^2=-9$. Thus, the equation does not represent a circle.
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