Question

f(x)=x^2-6x-3
vertex?
equation of the line symmetry?
max/min of f(x)
is the value of, f(3)=-12 a min or max?
graph?

Answer 1

I think it is
(3,-12)
f(3)=-12
-12
minimum

Answer 2

vertex: (-b/(2a), f(-b/(2a)))
line of symmetry: x=-b/(2a)
max/min: f(-b/(2a))