Answer:
Explanation:
You could complete the square to do this, or you could just evaluate the h coordinate using the simple formula

then find k by subbing that h value into the equation for x to find y which is the same as k. In our quadratic, a = 4, b = -8, and c = -4.

Now sub that value into the quadratic to find y (k):

The vertex of the quadratic is (1, -8)