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anonymous
 3 years 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.
anonymous
 3 years 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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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i 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.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Thank you so so much! you were a great help! :D
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