Question

HELP PLS. Use the information provided to write the vertex form equation of each parabola.

1. y = -7x^2 - 14x - 6

Answer 1

Notice it's in standard form \[y=ax^2+bx+c\] right

Answer 2

yeah

Answer 3

And vertex form is \[y=a(x-h)^2+k\] where (h,k) is the vertex

Answer 4

We want it in that form

Answer 5

You can find the vertex simply by using \[\frac{ -b }{ 2a }\] so what will it be?

Answer 6

-1

Answer 7

Right, so that is our x value, now we need the corresponding y value

Answer 8

Any idea how to find it?

Answer 9

plug it in?

Answer 10

Right! Plug in for x

Answer 11

y = -7 + 14 - 6

Answer 12

Look again

Answer 13

ohhh wait

Answer 14

49 + 14 - 6

Answer 15

No you're good sorry :)

Answer 16

oh haha

Answer 17

so is that the answer?

Answer 18

So we get y = 1 right

Answer 19

Our vertex is (-1,1)

Answer 20

Now simply plug in the values into the vertex form I showed you earlier

Answer 21

wait I got y = 57

Answer 22

\(\color{blue}{\text{Originally Posted by}}\) @joshoyen
y = -7 + 14 - 6
\(\color{blue}{\text{End of Quote}}\)
no this is good

Answer 23

ohh okay

Answer 24

@Astrophysics wait on my paper , it says the answer is y = -7(x + 1)^2 + 1

Answer 25

Remember what I said, plug in the vertex into the vertex form I showed you earlier

Answer 26

Vertex form is \[y=a(x-h)^2+k\] where (h,k) is the vertex

Answer 27

Ohhhh, okay i see now

Answer 28

thank you

Answer 29

Yw :)