jademarie7102orfz5i jademarie7102orfz5i
  • 15-05-2020
  • Mathematics
contestada

Question 5
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Question 5 class=

Respuesta :

ko3st
ko3st ko3st
  • 19-05-2020

Answer:

x² + 4x + 3

Step-by-step explanation:

Supose answer A is true...

Because the division of

{ (x -5) * (x² + 4x + 3) } / (x -5) = (x² + 4x + 3)

.... you should only have to check if

(x -5) * (x² + 4x + 3) = x³ - x² - 17x - 15

That is what to do:

(x -5) * (x² + 4x + 3)

using FOIL method you get...

x³ + 4x² + 3x - 5x² -20x - 15

x³ + (4x² - 5x²) (-20x + 3x) - 15

and this is exactly x³ - x² - 17x - 15

Hence Answer A is correct.

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