Answer: The vertex of the given parabola is (-3, -7).
Step-by-step explanation: We are given to find the vertex of the parabola with the following equation :

We know that
the vertex form of a parabola is given by
 where (h, k) is the vertex of the parabola.
 where (h, k) is the vertex of the parabola.
From equation (i), we have

Comparing the above equation with the vertex form, we get
vertex, (h, k) = (-3, -7).
Thus, the vertex of the given parabola is (-3, -7).