1 2x 2 4x 2 0 July 8, 2019 16 32 64 128 2x 1 2 4x 5 2 0 1 2x 2 4x 3 0 1 2x 2 4x 4 0 2x y =- 1 y 2 4x 2 0 6 2x 1 6 )= 5 2 4x 0 2 1 2 2x 0 1 )= 2 4x 0 08 2cos 2 4x )- 6cos 2 2x )+ 1 0 1 2 4x 3 2x 0 7 )=- 2 4 2x 1 2 4x 2 5 0 is not a quadratic equation 2x 1 2 4x 2 1 0 tìm x
