Question

Where is the vertex of the parabola?

y = x2 + 2x + 3


is it above the x-axis
below the x-axis
on the x-axis
on the y-axis

Answer 1

You need to find the x coordinate of the vertex by using

x = -b/2a

so x = -2/2

x = -1

so when x = -1 you find the vertex.

Put in x = -1 and that will give you the y coordinate