SOLUTION: Determine without graphing, whether the given Quadratic Function has a maximum value or a minimum value and then find that value.
I know bc it is negative -5x^2 it opens downwar
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Question 1143551: Determine without graphing, whether the given Quadratic Function has a maximum value or a minimum value and then find that value.
I know bc it is negative -5x^2 it opens downward, so it is a maximum value. I thinking that part is right???
I'm confused on how to find the value
I could really use some help.
I put in a & b into x= -b/ 2a
But I'm just not sure if that's what I'm supposed to use to get the answer
Duh & Double duh
Help!
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I know bc it is negative -5x^2 it opens downward, so it is a maximum value. I thinking that part is right???
=================
y = -5x^2 does have a maximum.
-------
I'm confused on how to find the value
I could really use some help.
I put in a & b into x= -b/ 2a
The max is at x = -b/2a
b = 0
---> max at x = 0
----> the point (0,0) is the max.
===========================================
But I'm just not sure if that's what I'm supposed to use to get the answer
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.
On finding the maximum/minimum of a quadratic function see the lessons
- HOW TO complete the square to find the minimum/maximum of a quadratic function
- Briefly on finding the minimum/maximum of a quadratic function
- HOW TO complete the square to find the vertex of a parabola
- Briefly on finding the vertex of a parabola
in this site.
Also, you have this free of charge online textbook in ALGEBRA-I in this site
- ALGEBRA-I - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this textbook under the topic "Finding minimum/maximum of quadratic functions".
Save the link to this online textbook together with its description
Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson
to your archive and use it when it is needed.
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