### Home > PC > Chapter 7 > Lesson 7.3.3 > Problem 7-128

7-128.

The

sign means you need factors when multiplied are positive.

Check values in the intervals about the zeros to find these positive intervals.

Write the answer in interval notation.

1. Factor and find the zeros.

2. Use the line below to test your intervals.

3. How many factors do you have?

4. Should they multiply to a positive or negative number?