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5.5E: Zeros de funções polinomiais (exercícios)

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    187176

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    Para os exercícios a seguir, use o Teorema do Zero Racional para ajudá-lo a resolver a equação polinomial.

    25. \(2 x^{3}-3 x^{2}-18 x-8=0\)

    26. \(3 x^{3}+11 x^{2}+8 x-4=0\)

    27. \(2 x^{4}-17 x^{3}+46 x^{2}-43 x+12=0\)

    28. \(4 x^{4}+8 x^{3}+19 x^{2}+32 x+12=0\)

    Para os exercícios a seguir, use a Regra de Sinais de Descartes para encontrar o número possível de soluções positivas e negativas.

    29. \(x^{3}-3 x^{2}-2 x+4=0\)

    30. \(2 x^{4}-x^{3}+4 x^{2}-5 x+1=0\)