Answer:
axis of symmetry at x=6
Explanation:

The given equation is in vertex form

(h,k) is the vertex
Compare the vertex form of the equation with the given equation.

The value of h = 6 and the value of k = 5
So vertex is (6,5)
Axis of symmetry lies at the x coordinate of the vertex
x coordinate of the vertex is 6
So axis of symmetry at x=6