The inequality is .

Step 1:

Solve the quadratic inequality.

                                   (Related function)

                   (Subtract from 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 .