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

7-128.

Solve each inequality.

  1. 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.

    Number line with highlighted points at 1, 3, & 5, in the spaces between points above the line are the following labels, starting left of 1, + times minus times minus = +, minus times minus times minus = minus, minus times + times minus = +, & minus times + times + = minus.

  1. 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?

    Number line with highlighted points at negative 3 & 5.

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