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 .