X 2 5x 4 x 5 )= 0 July 8, 2019 16 32 64 128 X 6 x 4 5x 2 5 0 X 5 x 4 6x 3 6x 2 5x 5 0 5 2 5x )+ 20 x 0 4 )- x X 5 5x 4 x 3 5x 2 0 5x 6 x 4 )- 2 x 1 )+ 5 0 X^2-5x-6 + 4x-50 Tìm x biết 5x 2 4 x 2 2x 1 )- 5 0