Determine which of the following polynomials has (x + 1) as a factor.
a) x2 - x - x+1
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#Answer
=x^2 - x - x+1
=x(x-1) - 1(x-1)
=(x-1)(x-1)
Therefore, x^2 - x - x + 1 has
the factor (x + 1) in it.
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