Step-by-step explanation:
if I understand you correctly :
f(x) = y = (x + 5)(x - 9)
an x-intercept is a point where y = 0.
this can happen for f(x) only when
x = -5 (then the first bracket turns 0, turning all y to 0)
and
x = 9 (then the second bracket turns 0, turning all y to 0)
so, we have 2 x-intercepts (as it should be for a quadratic function) :
(-5, 0)
(9, 0)
