anonymous
  • anonymous
Directrix: Y=9 Focal Point: (7,6) Create an equation for a parabola.
Geometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@Hero
anonymous
  • anonymous
The work should look like this
1 Attachment
anonymous
  • anonymous
I can upload another example if needed

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Hero
  • Hero
Seems easy enough. What prevents you from being able to do it yourself?
anonymous
  • anonymous
I am not good at foiling, or solving for a variable
Hero
  • Hero
Show the steps up to the point where you get stuck. Then I'll help.
anonymous
  • anonymous
In the picture, where it says y2^2+6y2+9 in red, I dont know how they are getting the numbers. If I knew where the numbers came from, I could solve it.
Hero
  • Hero
It comes from squaring \((y_2 + 3)^2\).
anonymous
  • anonymous
ok, but where does the 6y2 and the 9 come in
anonymous
  • anonymous
oh i see, i think i got it now!!!!
Hero
  • Hero
\(\begin{align*}(y_2 + 3)^2 &= (y_2 + 3)(y_2 + 3)\\&=y_2(y_2 + 3) + 3(y_2 + 3) \\&= y_2^2 + 3y_2 + 3y_2 + 9 \\&=y_2^2 + 6y_2 + 9\end{align*}\)
anonymous
  • anonymous
ok, thank you so much! I believe I got it know!
Hero
  • Hero
Okay, good.

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