Answer:
x = -3
Step-by-step explanation:
The axis of symmetry of a parabola is the vertical line that passes through the vertex, dividing the parabola into two symmetrical halves.
If (h, k) represents the coordinates of the vertex, then the equation of the axis of symmetry is x = h.
The vertex of an upward-opening parabola is the point at the minimum y-coordinate where the parabola reaches its lowest value. So, for the given parabola, the vertex is at (-3, -2), and so the equation of its axis of symmetry is x = -3.