How do I find vertex of a parabola with 2 x-intercepts and 1 y-intercept: x intercepts: (-2,0), (8,0) and y intercepts: (0, -16)?
The function is
Any quadratic function can be written as
In this case youy can easily find, that
The remaining 2 points can be used to form aa set of equations
From these equations you find that