Question

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?

A.(–8, 0) and (4, 0)
B.(8, 0) and (–4, 0)
C.(2, 0) and (–1, 0)
D.(–2, 0) and (1, 0)

Answer 1

its a

Explanation:

took the quiz

Answer 2

The values of x that make f(x)=0 are the values of x that make its factors zero.
x+8 = 0
x = -8

x-4 = 0
x = 4

The appropriate choice is
A. (-8, 0) and (4, 0)