Answer
$(-4, -9)$
Work Step by Step
$f(x)=x^2+8x+7$
Vertex is $-b/2a$
$a=1$, $b=8$, $c=7$
$-b/2a$
$-8/2*1$
$-8/2$
$-4$
$f(x)=x^2+8x+7$
$f(-4)=(-4)^2+8*-4+7$
$f(-4) =16-32+7$
$f(-4) = -9$
$(-4, -9)$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 11 - Section 11.6 - Further Graphing of Quadratic Functions - Exercise Set - Page 819: 1
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