Respuesta :

Answer:

Vertex is (2, 11)

Step-by-step explanation:

Call the vertex (h, k)

A quick way to find h is use the formula h = -b/2a

In your case, h = -8/-4 = 2

Now, to find k.

k = f(2) = -2(2)^2 +8(2) + 3

            = -8 + 16 + 3

             = 11

Vertex is (2, 11)