In this lesson, we will learn how to use Descartes’ rule of signs to get all possible numbers of positive and negative real roots.
Q1:
Using Descartes’s rule of signs, find which of the following describes the possible real zeros of ℎ(𝑥)=3𝑥+2𝑥−3𝑥+𝑥+6𝑥+2.
Q2:
Using Descartes’s rule of signs, find which of the following describes the possible real zeros of 𝑓(𝑥)=−6𝑥+3𝑥+7𝑥−1.
Q3:
Using Descartes’s rule of signs, find which of the following describes the possible real zeros of 𝑔(𝑥)=−𝑥−3𝑥+4𝑥+9𝑥−4.
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