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15-08-2019
Mathematics

contestada

joshua wants to know if x-5 is a factor of the polynomial P(x)=x^3-5x^2-x+5

Respuesta :

Аноним Аноним

15-08-2019

Answer:

See below.

Step-by-step explanation:

By the Factor Theorem, if (x - a) is a factor of P(x) then P(a) = 0.

So if x - 5 is a factor then P(5) = 0:

P(5) = 5^3 - 5(5)^2 - 5 + 5

= 125 - 125 - 5 + 5

= 0.

Thus, x -5 IS a factor.

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