SOLUTION: Using Descartes Rule of Signs, determine the number of possible positive real roots of the polynomial 3x4 + 5x3 + 8x2 - 7x + 2.

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Question 90595: Using Descartes Rule of Signs, determine the number of possible positive real roots of the polynomial 3x4 + 5x3 + 8x2 - 7x + 2.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
determine the number of possible positive real roots of the polynomial
f(x) = 3x^4 + 5x3 + 8x2 - 7x + 2
# of changes of sign = 2
# of Positive roots 2 or 0
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f(-x) = 3x^4-5x^3 +8x^2 + 7x + 2
# of changes of sign = 2
# of Negative roots = 2 or 0
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Cheers,
Stan H.