College Algebra 7th Edition

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

Chapter 1, Equations and Graphs - Chapter 1 Review - Exercises - Page 169: 13


No graph.

Work Step by Step

We convert the equation to the circle formula by completing the square: $x^2+y^2+72=12x$ $(x^2-12x)+y^2=-72$ $(x^2-12x+36)+y^2=-72+36$ $(x-6)^2+y^2=-36$ Since $r^2$ is negative this equation does not make sense and has no graph.
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