Sketch the graph of f(x)= 2x^2 8x + 7 and identify the vertex and the axis of the parabola.

i have no idea how to do it.

can you please give me step by step on how to do it.

like what is the first step and so on.

thank you.

Printable View

- Mar 21st 2012, 06:52 PMCandy101Graphing a Parabola in Standard Form
Sketch the graph of f(x)= 2x^2 8x + 7 and identify the vertex and the axis of the parabola.

i have no idea how to do it.

can you please give me step by step on how to do it.

like what is the first step and so on.

thank you. - Mar 21st 2012, 07:04 PMProve ItRe: Graphing a Parabola in Standard Form
- Mar 21st 2012, 07:30 PMCandy101Re: Graphing a Parabola in Standard Form
ok i got this far and now im stuck, and i don't know is this step is correct

f(x)= 2(x^2 +4x+4)7-4

i do not what to do after this. - Mar 21st 2012, 07:38 PMProve ItRe: Graphing a Parabola in Standard Form
- Mar 21st 2012, 08:27 PMCandy101Re: Graphing a Parabola in Standard Form
so will it be

$\displaystyle \displaystyle 2\left(x^2 + 4x + \frac{7}{4}+4\right) $ ???

if so then what do i do after that

i watch some videos on it, and this is what i came up with

$\displaystyle \displaystyle 2\left(x^2 + 4x +4 \)2(-4\right)+7 $

$\displaystyle \displaystyle 2\left(x^2 + 4x +4 \)-8\right+7 $ = $\displaystyle \displaystyle 2\left(x^2 + 4x +4 \)-1\right $

then i write it in standard form $\displaystyle \displaystyle f(x)= a\left(x- h\)^2+k\right $

isnt that correct? - Mar 22nd 2012, 02:04 AMProve ItRe: Graphing a Parabola in Standard Form