The image of a parabolic lens is traced onto a graph. The function f(x) = (x + 8)(x – 4) represents the image. At which points does the image cross the x-axis?

Question

(–8, 0) and (4, 0)
(8, 0) and (–4, 0)
(2, 0) and (–1, 0)
(–2, 0) and (1, 0)

Answer 1

(-8, 0) and (4, 0)