Answer:
x=-3
Step-by-step explanation:
f(x) = -2(x + 3)^2 – 5
This quadratic is in the form
f(x) = a(x - h)^2 + k
f(x) = -2(x - -3)^2 + - 5
Where (h,k) is the vertex
(-3,-5)
We know the axis of symmetry is along the vertex
x=h is the axis of symmetry
x=-3
