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  • 09-03-2021
  • Mathematics
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Is x - 1 factor of 7x ^ 3 - x ^ 2 - x - 5 ?

Respuesta :

DWRead
DWRead DWRead
  • 10-03-2021

Answer:

Step-by-step explanation:

f(x)  = 7x³ - x² - x - 5

To test if (x-1) is a factor, calculate f(x) for x=1:

f(1) = 7·1³ - 1² - x - 5 = 0

Since f(1) = 0, (x-1) is a factor.

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