Use the Intermediate Value Theorem and synthetic division to determine whether or not the following polynomial

Question

Find the upper and lower bounds for the following polynomials.

P(x) = x^3 - x^2 + x - 2

P(x) = x^3 + 2x^2 - 4

Answer 1

the upper bounds is +infinity and the lower bounds is -infinity.
the polynomials have a single zero real in (0,2) .

Answer 2

They have odd degree ... the values for both are unbounded below (as x goes to negative infinity) and unbounded above (as x goes to positive infinity) for real x.