anonymous
  • anonymous
Write the vertex form of the equation of the parabola which has a vertex of (0, 0) and contains the point (2, –2). help please.
Mathematics
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SOLVED
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katieb
  • katieb
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AbdullahM
  • AbdullahM
Welcome to OpenStudy! @museee Do you know what the vertex form is?
anonymous
  • anonymous
thank you . and its a(x-h)^2+k, right ?
AbdullahM
  • AbdullahM
correct, where (h,k) is the vertex

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AbdullahM
  • AbdullahM
So first of all, lets plug in the vertex into this equation. :)
anonymous
  • anonymous
but how do i find that ? im sorry im really terrible at math
AbdullahM
  • AbdullahM
vertex is (0,0) in the form of (h,k) that means h=0 and k=0
AbdullahM
  • AbdullahM
so if we plug that into the vertex form we get: \(\sf\Large y=a(x-h)^2+k\) \(\sf\Large y=a(x-0)^2+0\) \(\sf\Large y=a(x)^2\)
AbdullahM
  • AbdullahM
Now plug in the points (2,-2) to solve for 'a'

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