1.

Determine which of the following polynomials has (x + 1) as a factor. x3 – x2 – x + 1

Answer»

f(- 1) = (- 1)3 – (- 1)2 – (- 1) + 1 

= -1 – 1 + 1 + 1 = 0 

∴ (x + 1) is a factor.



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