Answer:
Its vertex is
.
The x value of its largest x-intercept is
.
The y value of the y-intercept is
.
Explanation:
A quadratic function in the format:

Has the vertex
given by:


So
, we have that:

So


Its vertex is

The x-intercept values are the values of x when f(x) = 0;
So






The x value of its largest x-intercept is
.
The y-intercept is the value of f(x) when x = 0, so, f(0)


The y value of the y-intercept is
.