Answer
See below
Work Step by Step
Obtain: $y=x^2+9x-12\\y=x^2+9x+20.25-32.25\\y=(x+4.5)^2-32.25$
The vertex is $(-4.5,-32.25)$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 9 Quadratic Relations and Conic Sections - 9.5 Graph and Write Equations of Hyperbolas - 9.5 Exercises - Mixed Review - Page 648: 53
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