College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.2 - Graphs of Equations in Two Variables; Circles - 1.2 Exercises - Page 103: 86

Answer

The equation represents a circle $ (x+0)^2+(y^2+3)^2=(\sqrt{7})^2$ with center $(0,-3)$ and radius is $\sqrt{7}$

Work Step by Step

$\underline{\textbf{Given equation}}$ $x^2+y^2+6y+2=0$ $\Rightarrow x^2+y^2+6y=-2$ $\Rightarrow x^2+y^2+6y=-2$ $\Rightarrow (x^2)+(y^2+6y)=-2$ $\Rightarrow (x^2)+(y^2+6y+9)=-2+9$ $\Rightarrow (x+0)^2+(y^2+3)^2=(\sqrt{7})^2$ Which is the standard form for the equation of circle with center $(0,-3)$ and radius is $\sqrt{7}$
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