Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
kymber
Group Title
How to find the maximum or minimum value of a quadratic function?
 2 years ago
 2 years ago
kymber Group Title
How to find the maximum or minimum value of a quadratic function?
 2 years ago
 2 years ago

This Question is Closed

2le Group TitleBest ResponseYou've already chosen the best response.1
You look at the vertex. Are you at the calculus level or the algebra level?
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
see the sign of x^2 coeffecient
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Algrebra II, year three in high school. It's the same as the vertex?
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
correct, vertex gives us max/min value. if x^2 coefficient is ve, its min if x^2 coefficient is +ve, its max
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
its the opposite actually. if x^2 coefficient is ve, its max if x^2 coefficient is +ve, its min
 2 years ago

2le Group TitleBest ResponseYou've already chosen the best response.1
What @ganeshie8 said, that will tell you whether the parabola faces up or down. The point at the vertex will be a min or a max depending on that coefficient.
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
dw:1349465625929:dw
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
so we have minimum value there
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
So how do you find the value of it?
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
max/min value = f(b/2a)
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
actually it comes from the formula for vertex, vertex = (b/2a, f(b/2a))
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.0
for parabola f(x)= a x^2 + b x +c the x coordinate of the vertex is b/(2a)
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Um, like this? dw:1349465829395:dw
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Given \[ax^2+bx+c=a(xh)^2+k\] The vertex is located at (h, k).
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
dw:1349465949629:dw
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
that gives the xcoordinate only, ycoordinate gives the max/min value.
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
coordinate is just a number i think
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
So how do I find the ycoordinate?
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
since you got, xcoordinate of vertex = b/2a = 5
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
put that x value = 5, in the quadratic, it gives u ycoordinate of vertex
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.0
notice in x^2 10x +25 b is 10 (negative 10) b/2a is +10/2*1= 10/2 = +5 use 5 for x in the equation to find the y value
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
I got it! Thanks guys \(\Large\ddot\smile\)
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
glad to hear friend :)
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.0
hopefully you got y=0 so the vertex is at (5,0) and the min value is 0
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
and hw do i get that
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Yep, I got 0. the smiley is \large\ddot\smile :P
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
\( \large\ddot\smile \) ah latex is beautifyul :)
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Yes it is :D
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Thanks, @kymber for teaching us something. \[\large \ddot \smile\] Awesome.
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Hehe \(\huge\ddot\smile\)
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
yeah , kymber also taught me to draw heart ♥ \(\huge \color{red}{♥}\)
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
\(\Huge\color{pink}{❥}\) Sideways!
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
i thought only AccessDenied is the latex guru... we have so many experts over here hmm :)
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
but thats cheating... thats not latex, u using unicode i guess
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
You're blowing my mind, @kymber !
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Lol yeah.. it's not a \(\LaTeX\) command. Just alt codes :
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
still its cool :)
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
:) yea these things i can see also. but sometime back i tried to use crossed swords unicode, and it didnt show up in many browsers :( from then i stopped using unicode, not sure why only few unicode characters show up...
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
this one : http://www.fileformat.info/info/unicode/char/2694/index.htm see if u can get this here...
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
\(\Huge{⚔}\)
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
i see a box, what u see at ur end hmm
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
: I see the swords..
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
i see box also
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
What browser are you guys using?
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
chrome too
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
I'm using Mozilla :P
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
firefox ?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
letme login through mozilla
 2 years ago

kymber Group TitleBest ResponseYou've already chosen the best response.4
Yeah. I switched to Chrome and it's a box. Use Mozilla! :P
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.2
mozilla wins !
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
what kind of black magic is this!
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Firefox is simply superior . .
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.