question in attachment

Question

devonhoward15 · Answer

@agent0smith

devonhoward15 · Answer

@mathmate

devonhoward15 · Answer

anyone?

devonhoward15 · Answer

i got below x-axis

agent0smith · Answer

http://hotmath.com/hotmath_help/topics/vertex-of-a-parabola.html there's an example here

devonhoward15 · Answer

i need help solving it... not a link... i dont understand it

photon336 · Answer

Yeah @Devonhoward15 you can find the x coordinate of the vertex easily using the fact that 

$$-\frac{ b }{ 2a }$$

devonhoward15 · Answer

is the answer below the x-axis?

photon336 · Answer

let's first focus on finding the axis of symmetry first and then determining how we should interpret this

$$y = ax^{2}+bx+c | x^{2}+3x+9$$ 

compare coefficients what are our a and b values? 


-b/2a

devonhoward15 · Answer

wait so it is below the x-axis? cause thats what i got

agent0smith · Answer

@Devonhoward15 did you actually read all the link? It has an example, just like this, near the bottom.

agent0smith · Answer

And stop asking about the answer. Do the work as @Photon336 is suggesting.

agent0smith · Answer

Show your work.

devonhoward15 · Answer

ill try... i dont know how to but ill try

devonhoward15 · Answer

i got it... https://www.desmos.com/calculator/mey71rif1d

devonhoward15 · Answer

its above the x-axis :)

devonhoward15 · Answer

@Photon336

agent0smith · Answer

Wasn't exactly the kind of work we were asking you to show

devonhoward15 · Answer

srry its a 20 question test and only have 1 hour and i just got done with number one

devonhoward15 · Answer

on have 37 mins for 19 questions now

devonhoward15 · Answer

*only