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 one year ago
More help, please??
Using complete sentences, explain how the Rational Root Theorem and Descartes’ Rule of Signs are used to find the zeros of a polynomial function.
 one year ago
More help, please?? Using complete sentences, explain how the Rational Root Theorem and Descartes’ Rule of Signs are used to find the zeros of a polynomial function.

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Holylion94
 one year ago
Best ResponseYou've already chosen the best response.1i don't know about rational root theorem but Descartes’ Rule of Signs is very simple. you take a polynomial, and see number of sign variation in the equation. then that many positive real roots will be there. eg: x^3x^2+x3=0 sign change like +  +  there are three changes, so there are 3 positive roots. next you replace x by x(x> x) then for that equation number of change in sign results the number of negative roots. so in the given eg: replace x by x x^3x^2x3=0 so sign change is like     that is no change => no negative roots. so this way we can find no. of positive and negative real roots and remaining are complex.

P.nut1996
 one year ago
Best ResponseYou've already chosen the best response.0Thank you so so much! you were a great help! :D
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