Question 92096
P(x) = -3x^5 -7x^3 -4x - 5
P(x) has 0 changes of sign so it has no positive rational roots.
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P(-x) = 3x^5 +7x^3 +4x-5
P(-x) has 1 change of sign; P(x) has one negative rational root.
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Cheers,
Stan H.