4 x 2 2 9 2x 1 2 July 8, 2019 16 32 64 128 4 x 2y 1 2 9 2x y 2 2 25 25 4x 3 2 9 2x 1 2 Tìm x biết 2x 1 2 4 x 2 2 9 4 x 2 - 9
