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 .