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Ans:



                              Squaring both sides
                                          2
                                2
                              9x  - 5 = 4x
                                2
                                      2
                              9x  - 4x  = 5
                                    2
                                 5x  = 5
                                2
                              5x  - 5 = 0
                                     Since, the degree of the equation is 2, therefore, it is a quadratic  equation.

               Example 3  : Represent in the form of the quadratic equation
                               (x - 3)(2x + 1) = x(x + 5)

                           Ans:  We have, (x - 3)(2x + 1) = x(x + 5)
                                 2
                                                  2
                                   2x  + x - 6x - 3 = x  + 5x
                                2
                                    2
                                  2x  - x  - 10x - 3 = 0
                               2
                                  x  - 10x - 3 = 0




































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