^^P.S. Who is Descartes anyway?
René Descartes - Wikipedia, the free encyclopedia
Rational Zeros Theorem. It basically gives the set of all possibilities of number that would satisfy
Descartes' Rule of Signs simply determines the number of possible solutions.
Rene Descartes was a French philosopher and mathematician who is known best for his works on the Cartesian coordinate system and his analytical geometry ideas provided the framework for Newton and Leibniz's Calculus.