The inequality is .

Step 1:

Solve the quadratic equation

                     (Related function)

                   (Add to each side)

                  (Factor)

or            (Zero productive property)

or                 (Simplify)

Step 2:

Plot and on a number line.

Observe the graph:

The number line divide into three intervals.

Step 3: Test a value from each interval of the original inequality.

Case (i):

                      (Original function)

            (Substitute )

                 (Evaluate powers: )

                       (Multiply)

                              (Simplify)

Case (ii):

                       (Original function)

            (Substitute )

                   (Evaluate powers: )

                         (Multiply)

                            (Simplify)

Case (iii):

                       (Original function)

                   (Substitute )

                       (Evaluate powers: )

                            (Multiply)

                                  (Simplify)

Hence, the solution set is .

It is shown on the number line.

Solution set is .