The inequality is .

Step 1:

Solve the quadratic equation .

                             (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 )

                                     (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 .