Question

Find the vertex of the parabola whose equation is y = x^2 + 2x + 9.

Answer 1

first coordinate of the vertex is \(-\frac{b}{2a}=-\frac{2}{2}=-1\)

Answer 2

second coordinate is what you get when you replace \(x\) by \(-1\)

Answer 3

(-1, 8)

(1, 12)

(0, 9)