Question

Identify the vertex and the axis of symmetry of the graph of the function y = 3(x + 2)^2 – 3.

Answer 1

I know that to find the axis of symmentry is x=-b/2a. But idk what b and a are in this problem.
vertex: (2, –3); axis of symmetry: x = 2
vertex: (–2, –3); axis of symmetry: x = –2
vertex: (2, 3); axis of symmetry: x = 2
vertex: (–2, 3); axis of symmetry: x = –2