Answer:
15
Step-by-step explanation:
since the x-intercepts are x = - 3 and x = - 5 then the factors are
(x + 3) and (x + 5), hence
f(x) = a(x + 3)(x + 5) ← a is a multiplier
let a = 1 then
f(x) = (x + 3)(x + 5) ← expand factors
f(x) = x² + 8x + 15 ← 15 is the constant term
