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@ @XU@                        @pý†bɾa@                             @

           [Quadratic Equation]                              (.)

           ax2 + bx + c = 0                             cba

                   .a ≠ 0

        .

                     [By Factorization]                   (.)

           :                                            ()
                   .ab = 0 ⇒ a = 0 b = 0

            .
                              . 3x 2 + 5x = 0

           3x 2 + 5x = 0
           x(3x + 5) = 0

           x =0                          3x + 5 = 0

           x =0                          x = −5
                                                3

x1 = 0 (                                             )

                                                        .x2  =  −5
                                                                 3
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