Which of the following statements are true of the graph of the function f(x)= (x+5)(x-3). Select all that apply.
A) the graph has a relative maximum
B) the graph has a relative minimum
C)the graph has an x-intercept at (5,0)
D)the graph has an x-intercept at (3,0)
E) the graph has a y-intercept at (0,-15)
F) the axis of symmetry is x=-2