menu
QAmmunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
Register
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
Find the maximum or minimum of the following quadratic function: y = -2x2 + 4x - 1 A. -1 B. 0 C. 1 D. 4
asked
Dec 16, 2017
174k
views
4
votes
Find the maximum or minimum of the following quadratic function: y = -2x2 + 4x - 1
A. -1
B. 0
C. 1
D. 4
Mathematics
high-school
EddyG
asked
by
EddyG
6.8k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
2
Answers
2
votes
all of the above sounds about right ;-;
Garrigan Stafford
answered
Dec 17, 2017
by
Garrigan Stafford
5.9k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
4
votes
Maximum or minimum value for a quadratic function:
y = -2x² + 4x - 1, a = -2, b = 4, c = -1
y
= (4ac - b²)/4a
= (4*(-2)(-1) - 4²) / 4*(-2)
= (8 - 16) /-8 = -8/-8 = 1.
Since the value it positive, it is a maximum.
C.
1
Thanos Tintinidis
answered
Dec 22, 2017
by
Thanos Tintinidis
6.2k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
7.4m
questions
9.8m
answers
Other Questions
How do you estimate of 4 5/8 X 1/3
Write words to match the expression. 24- ( 6+3)
Please solve the following equation. x-6x=56
whats the most accurate estimation of 65+77
Find the additive inverse of 18/23
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search QAmmunity.org