Question

find the zeroes of the cubic polynomial x^3+2x^2-x-2​

Answer 1

Answer:

We will use the Rational Root Theorem:

If the rational number r/s is a root of a polynomial whose coefficients are integers, then the integer r is a factor of the constant term, and the integer s is a factor of the leading coefficient.

So, if the constant therm is 2 and the leading factor is 1, candidates for roots are:

±1, ±2

If we try them, we discover that the roots are:

±1, 2

Step-by-step explanation: