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4-84.

   Solve each of the following inequalities. Express the solutions algebraically and on a number line.  Homework Help ✎

  1. Solve the equation for . Plot the boundary point on a number line. Test a point on each side of the boundary point. Shade the region that makes the inequality true.

    number line a

  1. See part (a). This inequality is quadratic, so look for two boundary points.

    or

    number line b