Question

A function f(x) has x-intercepts of –3 and –5. What is the constant term in the function?

f(x) = x2 + 8x +

Answer 1

If the x-intercepts are -3 and -5, the monic quadratic is (x + 3)(x + 5) = x^2 + 8x + 15. So the constant term is 15.