Math Question

[Zap Brannigan]

Does anyone know the solution to 4x^2+8x-1?

I need to put it into a form that can be graphed.

 

[lokiju]

Don't you mean math?

 

[Zap Brannigan]

Yes, edited. lol

 

[RapidSnail]

Originally posted by: Zap Brannigan
Does anyone know the solution to 2x^2+3x-1?

I need to put it into a form that can be graphed.

Maybe I don't understand the criteria, but it is already graphable in Ax^2+Bx+C form.

 

[mobobuff]

5x^2 - 1

 

[Zap Brannigan]

Nevermind, think I got it.

 

[TanisHalfElven]

your kidding right ?
any calculator today would solve it.
if you don't have access to it use the quadratic formula.


edit.
kids these days. in my day we had to sketch graphs like this by hand.

 

[gorcorps]

It's already graphable... it's a parabola

 

[Zap Brannigan]

I think I need to solve by using b/2a in order to find the vertext and go from there.

 

[Zap Brannigan]

Originally posted by: gorcorps
It's already graphable... it's a parabola

Well I need the actual interecepts and vertex to graph it.

 

[Zap Brannigan]

Thanks again!

 

[BrownTown]

wow, flash back to seventh grade here. If ya wanna be lazy just graph it on a calculator and it will tell you the intercepts.

 

[gorcorps]

Originally posted by: Zap Brannigan
Thanks again!

:thumbsup:

 

[ConstipatedVigilante]

Originally posted by: Zap Brannigan

Originally posted by: gorcorps
It's already graphable... it's a parabola

Well I need the actual interecepts and vertex to graph it.

Quadratic formula for intercepts. Man, I wish I knew what a derivative was way back when I was graphing quadratics.

 

[Skipholiday]

Originally posted by: BrownTown
wow, flash back to seventh grade here.

Ahhh 7th grade. My underarm hair sprouted.. Girls suddenly all looked pretty.
I was dumb as a box of rocks. (not much sharper now)
BUT I didn?t need a man card.
When I crushed my 1st BUD against my head I knew I was a man.
Reconfirmed 2 years later "highspeed police chase" in my driveway.
Thought I was safe at home..WRONG
Stayed in jail 3 days..

I wonder what they do with that man card?

Does it have a man limit?
When it runs out, are you gay?

negative balance = small breast?

 

[TecHNooB]

I think he meant complete the square..

 

[LuckyTaxi]

another useless thing the poor guy has to learn.

 

[Xonoahbin]

Originally posted by: ConstipatedVigilante

Originally posted by: Zap Brannigan

Originally posted by: gorcorps
It's already graphable... it's a parabola

Well I need the actual interecepts and vertex to graph it.

Quadratic formula for intercepts. Man, I wish I knew what a derivative was way back when I was graphing quadratics.

I'm just pimping out Calc I this year and I'll have you know that deriving is the most useful thing I've ever learned in math. Damn it's good.

 

[Fenixgoon]

Originally posted by: ConstipatedVigilante

Originally posted by: Zap Brannigan

Originally posted by: gorcorps
It's already graphable... it's a parabola

Well I need the actual interecepts and vertex to graph it.

Quadratic formula for intercepts. Man, I wish I knew what a derivative was way back when I was graphing quadratics.

how does having derivatives help you solve the quadratic formula? i can't think of a time i used the quadratic formula for things involving derivatives, except for some diff-eq's

 

[gorcorps]

Originally posted by: Fenixgoon

Originally posted by: ConstipatedVigilante

Originally posted by: Zap Brannigan

Originally posted by: gorcorps
It's already graphable... it's a parabola

Well I need the actual interecepts and vertex to graph it.

Quadratic formula for intercepts. Man, I wish I knew what a derivative was way back when I was graphing quadratics.

how does having derivatives help you solve the quadratic formula? i can't think of a time i used the quadratic formula for things involving derivatives, except for some diff-eq's

Well derivative will get you the vertex, which the OP said he needed but the other guy didn't mention when he said it.

 

[DrPizza]

I don't know how the heck you guys are solving anything or graphing anything...
All I see is a trinomial. I don't even see an equals sign, let alone something that would indicate it's a function.



Yeah, I know, he meant y= or 0=...

Also, I don't know how you'd manage to avoid the quadratic formula in calculus... seems to me it pops up quite frequently. Find the exact x-values of the relative maximum and minimum values of y = x^3 + 5x^2 - 8x + 7
You're certainly not going to get the answer to that question with a TI83 or TI84