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)
Answer from: Quest
step-by-step explanation:
Answer from: Quest
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