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

7-128.

The > sign means you need 3 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) ∪ (3,5)

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?