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

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)

Answer 2

Answer:

its a

Step-by-step explanation:

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