I am given the following info:

2 x-intercepts: (3,0) (9,0)

there is a maximum occurring at 2

I figured I would use the equation y=a(x-p)(x-q)

so I plugged in the two x-ints

y=a(x-3)(x-9)

Now my question is that if I know that the maximum is 2, where exactly would that go in the equation?