Answer:
A. y = 9(x +1/2)^2 - 13/4.
Explanation:
y = 9x^2 + 9x - 1
y = 9(x^2 + x) - 1
y = 9 [ (x + 1/2)^2 - 1/4] - 1
y = 9 (x + 1/2)^2 - 9/4 - 1
y = 9(x +1/2)^2 - 13/4.
Answer: First Option
For a quadratic function of the form:
The vertex form of the equation is:
Where the vertex is the point (h, k) and
In this case the equation is:
So:
Therefore:
Finally the equation in vertex form is:
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