# Quadratic equation applying to graphs

1. Feb 12, 2006

### dilan

Hi,

I just need to learn in drawing graphs using a quadratic equation. Also I need to know how to find the minimum and maximum point and the line of cemetry from the equation (I need to know by proving it in the equation)

Has anyone got any website to clearly learn about this? I know quadratic equations but just coming into the graphings. So just need to know about graphing using the equation.

Please if you have any website post it here.

Thank you very much

2. Feb 12, 2006

solve tis problem:
2^x+x^2=1
Prove that this equation has only two solutions,

3. Feb 12, 2006

### d_leet

How does this have anything at all to do with dilan's question?

4. Feb 12, 2006

### dilan

Ya a bit confusing

I can't realy understand what you are saying i.mehrzad?
I need about graphing and some more to know that I added in the above post.

5. Feb 12, 2006

### JasonRox

Maybe what he was trying to say is practice.

Websites can teach you a little bit, but they always finish with practice.

6. Feb 12, 2006

### dilan

Well I know

Well I know about the quadratic equations and how to solve them. But I have a bit of trouble in the graphs (The one that turn). I want to know how to find the line of cemetry and the maximum and the least points (I think this is called the vertex) from the equation it self. I want them proved also.

Drawing the graph is simple with the equation given. But I need to know how to get like say
2x+3> x+4

converted in to the graph type of equation and solve every thing without the graph like finding the vertex and finding the line of cemetry.
Thanks

7. Feb 12, 2006

### HallsofIvy

Last edited by a moderator: May 2, 2017
8. Feb 12, 2006

### robphy

Maybe a little physical interpretation can help.
Regard the quadratic equation as a model for the motion of a projectile. The extremum occurs when the instantaneous velocity (the slope on a position vs time graph) is zero.

Here's a question for you: