Answer:
equation of the axis of symmetry is x = - 3
Step-by-step explanation:
Recall that the axis of symmetry of a quadratic is the vertical line of the form
x = x vertex
and in our case the x position of the vertex is x = -3 because the expression for the quadratic is given in VERTEX form, and the x of the vertex is evident from the number that is added to x inside the parenthesis,
then, the equation of the axis of symmetry is:
x = - 3
