Can someone please help me with #10, #11, and #12 of the graphing quadratics using-b/2a assignment?

10) f(x) = -x2 - 6x - 9 b Vertex: Axis of Symmetry (AOS): Parabola opens The vertex is a Range: up or down? max or a min? Y-intercept: # of x-intercepts: 11) f(x) = 3x2 - 18x + 15 b 2a Vertex: Axis of Symmetry (AOS): Parabola opens The vertex is a Range: up or down? max or a min? Y-intercept: # of x-intercepts: b 2) f(x) = -4x2 - 3x -4 2a f ( - 5) Vertex: Axis of Symmetry (AOS): Parabola opens The vertex is a Range: up or down? max or a min? Y-intercept: # of x-intercepts