Which of these polynomials has a zero of multiplicity 3 at z = 1? a. p(r) = xª + 5x³ + 5x² – 5x – 6 b. p(x) = x* – 2r³ – 3x² + 8x – 4 c. p(x) = x* +x³ – 9z² + 11x – 4 d. p(x) = rª – 4r³ + 6x² – 4x +1

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Polynomials

Try substituting 1. You will get 6 and not 0. Try other real values also. What About -2? Let us check.