If the x-intercepts are (-5,0) and (3.0), then the x-coordinate of the vertex is Then I also know the equation of the axis of symmetry is

If this is for a parabola, then the x-coordinate is -1, since it is directly in the middle of -5 and 3, with 4 spaces on each side (symmetry). The equation is just x = -1 since it just shows the equation of the vertical line which splits the parabola into two equal parts

We need more info then that