Chapter 3 - Section 3.4 - Real Zeros of Polynomials - 3.4 Exercises - Page 284: 80

$-1,+2$

Possible zeros are $\pm1$ a. Upper bound test: test $+1$, it is not an upper bound, move up and test $+2, +3, ...$ we found that $+2$ is an upper bound as shown in the synthetic division. b. Lower bound test: test $-1$, we found that it is a lower bound.