Complete the steps to solve the polynomial equation x3 – 21x = –20. according to the rational root theorem, which number is a potential root of the polynomial –7 0 1 3

Option C

Step-by-step explanation:

We are given that an equation

We have to find the root of given polynomial equation by using rational root theorem.

Factor of 1 is 1.

Factors of 20 are

The  roots of given polynomial is in the form

When we substitute x=1 then we get

Therefore, 1 is a root of given polynomial.

Hence, option C is correct.