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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)

Respuesta :

apologiabiology
where y=0
y=(x+8)(x-4)
0=(x+8)(x-4)
set to zero
x+8=0
x=-8

x-4=0
x=4

(x,y)

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

A is answer

Answer:

A.(–8, 0) and (4, 0)

Step-by-step explanation

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