What are the vertex, axis of symmetry, maximum or minimum value, domain, and range of the function, and x and y intercepts for #y=x^2+12x-9#?
x of axis of symmetry and vertex:
x = -b/2a = -12/2 = -6. y of vertex:
y = f(-6) = 36 - 72 - 9 = -45
Since a = 1, the parabola opens upward, there is a minimum at