Answer
vertex is $(2,-9)$
Work Step by Step
$f(x)=x^2-4x-5$
vertex is $x=-b/2a$
$x=-b/2a$
$x=-(-4)/2*1$
$x=4/2$
$x=2$
$f(x)=x^2-4x-5$
$f(2)=2^2-4*2-5$
$f(2)=4-8-5$
$f(2)=-4-5$
$f(2)=-9$
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 - Practice - Page 817: 4
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
