marimarisol508
marimarisol508 marimarisol508
  • 06-06-2020
  • Mathematics
contestada

What are the x-intercepts of the graph of the function below?
y= x^2+3x – 28
A. (7,0) and (4,0)
B. (-7,0) and (-4,0)
C. (7,0) and (-4,0)
D. (-7,0) and (4,0)

Respuesta :

00001050
00001050 00001050
  • 06-06-2020
The answer to your question is D.
Answer Link
tylerflorida34638
tylerflorida34638 tylerflorida34638
  • 06-06-2020
y = x^2 + 3x - 28
y = x^2 + 7x - 4x -28
y = (x^2 + 7x) - (4x - 28)
y = x(x + 7) - 4(x + 7)
y = (x + 7)(x - 4)
y = -7, 4

The answer is D. (-7, 0) and (4, 0)
Answer Link

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