The vertex of a parabola is at (12, -4), and its axis of symmetry is vertical. One of the x-intercepts is at $(18, 0)$. What is the x-coordinate of the other x-intercept?
The other intercept is the same distance from the axis of symmetry BUT ON THE OTHER SIDE
12 to 18 is distance of 6 so the other is
x coordinate = 6
