How to use Descartes rule of signs to determine the number of positive and negative zeros

The video tutorial explains the limitations of rational root tests and introduces Descartes' Rule of Signs to determine the number of positive and negative real zeros in a polynomial. It details the process of identifying sign changes to find positive real zeros and evaluates F of negative X to find negative real zeros. The tutorial concludes with a final problem to reinforce the concepts.

What is the relationship between the number of positive real zeros and even integers according to the rule?

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How does the evaluation of F(-X) differ from F(X) in the context of Descartes' Rule?

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