Ononot — If P(x) = x^4 + 2x^3 - x^2 - 2x + 1, what is the sum of the

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Polynomialshard

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If $P(x) = x^4 + 2x^3 - x^2 - 2x + 1$ , what is the sum of the roots of $P(x) = 0$ ?