Question

How do you find the vertex of a parabola `f(x)=x^2 -2x -15`?

Answer 1

`y = x^2 - 2x - 15`

Explanation:

x-coordinate of vertex: `x = (-b/2a) = 2/2 = 1`
y-coordinate of vertex: `y = f(1) = 1 - 2 - 15 = -16`