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Home > CCA > Chapter 11 > Lesson 11.3.4 > Problem 11-119

11-119.
  1. Solve the equations and inequalities below. Write your solutions in exact form. Homework Help ✎

    1. 12-7412-74 = 12-74

    2. (b − 4)2 < 12

    3. − 9 ≤ 21

    4. 5n2 − 11n + 2 = 0

See problems 11-71 and 11-83 for additional help.

Multiply both sides by 12 as a Fraction Buster.

Solve the equation (b − 4)2 = 12 to find the boundary points.

Graph the values you found for b on a number line. Then test values from each region to determine which region(s) make(s) the inequality true.

See the help for part (b).

−33 ≤ x ≤ 27

This quadratic is factorable.

(5n ? 1)(n ? 2) = 0