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10-128.
  1. Without graphing, find where each of the following curves crosses the x-axis. (Find the exact points!) Homework Help ✎

    1. f(x) = x2x − 12

    2. f(x) = 2x2 − 3x − 9

    3. f(x) = 2x2 + x – 7

    4. f(x) = 3x2 – 2x + 7

    5. f(x) = 3x3 + 2x2 – 8x

    6. f(x) = 2x3 + 2x2 + 13x

For each equation, let f(x) = 0. Then solve by factoring and/or using the Quadratic Formula.

x = −1.5, 3

Each term has an x.