Question

What is the equation of the line of symmetry for the graph of y = 3(x + 2)2 – 4?

x = –4

x = –2

x = 2

x = 3

Answer 1

your vertex is at (-2, -4), by the vertex form i showed you before
the line of symmetry looks like this:
so it's around the x-value
therefore, the line of symmetry is x=-2