Answer
Vertex = (-5, -5)
Work Step by Step
y = $x^{2}$ + 10x + 20
y = $(x+5)^{2}$ - 25 + 20
y = $(x+5)^{2}$ - 5
Thus vertex = (-5, -5)
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 13 - Section 13.1 - The Parabola and the Circle - Exercise Set - Page 925: 13
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