College Algebra & Trigonometry, 2018a

100 CHAPTER 2. POLYNOMIAL AND RATIONAL FUNCTIONS
6
4
2
x = −1 x ≈−0.268
−4 −3 −2
x ≈−3.732
−1 1 2 3
−2
Now that we’ve indentified the roots, we can determine where the y values are
greater than zero and where they’re less than zero.
For y ≥ 0, we can see that this corresponds to: −3.732 ≤ x ≤−1 OR x ≥−0.268
For y