Which equation has a graph that is a parabola with a vertex at (-2,0)

The equation of a parabola with a vertex at (h, k) is

f (x) = a (x-h) + k

where a is a constant not equal to zero.

So for (h, k) = (-2,0), the general equation is

y=f (x) = a (x--2) ^2+0,

y=a (x+2) ^2, or

If a=1 and expand,

y=x^2+4x+4