Answer:
Vertex Form: y = (x+2)^2 - 9
Vertex : (-2,-9)
Step-by-step explanation:
First, we need to use the -b/2a formula to find the x value or the axis of symmetry.
-4/2 = -2
Now we have that, we have our x-coordinate. Now we need to find our y variable. We have to plug the x value into the equation.
-2^2 + 4(-2) - 5
+ 4 - 8 - 5
- 4 - 5
-9
Now that we have our coordinates, we have our vertex.
(-2,-9)
Now we have to convert it to vertex form.
Vertex Form: y = a(x-h)^2 + k
y = 1(x--2)^2 + (-9)
y = 1(x+2)^2 - 9
