anonymous
  • anonymous
What are the coordinates of the vertex of the parabola of f(x)=x^2-2x-3?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Zenmo
  • Zenmo
You want to find (x, y), the vertex of the parabola. So, we need to find x first by using the formula \[\frac{ -b }{ 2a }\].
anonymous
  • anonymous
So \[\frac{ -2 }{ 2x }\]
anonymous
  • anonymous
?

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Zenmo
  • Zenmo
|dw:1450225683711:dw|
Zenmo
  • Zenmo
need hint?
anonymous
  • anonymous
I showed you the equation I got?
Zenmo
  • Zenmo
you didnt use the formula properly
Zenmo
  • Zenmo
ops, i made a slight error \[ax^2+bx+c\]
Zenmo
  • Zenmo
Try again.
anonymous
  • anonymous
I'm kind of confused.
Zenmo
  • Zenmo
what is a and b?
anonymous
  • anonymous
Would it just be 2/2? So that simplifies to 1?
Zenmo
  • Zenmo
yes
anonymous
  • anonymous
Alright thank you!
Zenmo
  • Zenmo
Now, plug that into the equation to find y, then you found the (x,y)
anonymous
  • anonymous
Do I plug 1 in for every x??
anonymous
  • anonymous
So it would be (1,-4)?
Zenmo
  • Zenmo
yes
anonymous
  • anonymous
Which makes my axis of symmetry x=1 and my minimum point -4. Cool. Thank you for the help!

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