joshoyen
  • joshoyen
HELP PLS. Use the information provided to write the vertex form equation of each parabola. 1. y = -7x^2 - 14x - 6
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Astrophysics
  • Astrophysics
Notice it's in standard form \[y=ax^2+bx+c\] right
joshoyen
  • joshoyen
yeah
Astrophysics
  • Astrophysics
And vertex form is \[y=a(x-h)^2+k\] where (h,k) is the vertex

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Astrophysics
  • Astrophysics
We want it in that form
Astrophysics
  • Astrophysics
You can find the vertex simply by using \[\frac{ -b }{ 2a }\] so what will it be?
joshoyen
  • joshoyen
-1
Astrophysics
  • Astrophysics
Right, so that is our x value, now we need the corresponding y value
Astrophysics
  • Astrophysics
Any idea how to find it?
joshoyen
  • joshoyen
plug it in?
Astrophysics
  • Astrophysics
Right! Plug in for x
joshoyen
  • joshoyen
y = -7 + 14 - 6
Astrophysics
  • Astrophysics
Look again
joshoyen
  • joshoyen
ohhh wait
joshoyen
  • joshoyen
49 + 14 - 6
Astrophysics
  • Astrophysics
No you're good sorry :)
joshoyen
  • joshoyen
oh haha
joshoyen
  • joshoyen
so is that the answer?
Astrophysics
  • Astrophysics
So we get y = 1 right
Astrophysics
  • Astrophysics
Our vertex is (-1,1)
Astrophysics
  • Astrophysics
Now simply plug in the values into the vertex form I showed you earlier
joshoyen
  • joshoyen
wait I got y = 57
Astrophysics
  • Astrophysics
\(\color{blue}{\text{Originally Posted by}}\) @joshoyen y = -7 + 14 - 6 \(\color{blue}{\text{End of Quote}}\) no this is good
joshoyen
  • joshoyen
ohh okay
joshoyen
  • joshoyen
@Astrophysics wait on my paper , it says the answer is y = -7(x + 1)^2 + 1
Astrophysics
  • Astrophysics
Remember what I said, plug in the vertex into the vertex form I showed you earlier
Astrophysics
  • Astrophysics
Vertex form is \[y=a(x-h)^2+k\] where (h,k) is the vertex
joshoyen
  • joshoyen
Ohhhh, okay i see now
joshoyen
  • joshoyen
thank you
Astrophysics
  • Astrophysics
Yw :)

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