X(X - 2009) + X - 2009 = 0X 2X 1 X 2 2     A X X 3

Bài 3 : (1 đ): Tìm x, biết : x(x - 2009) + x - 2009 = 0

x

2x 1 x 2



²

 ^{ }







A

x

x





3