The inequality is .

Step 1:

Solve the quadratic equation .

                                        (Related function)

                                      (Add to each side)

                                     (Quadratic formula)

           (Substitute and )

                                            (Simplify)

or         (Write into two equations)

or                               (Simplify)

Step 2:

Plot and on a number line.

Observe the graph:

The number line is divided 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 .