X 3 4 81 July 8, 2019 16 32 64 128 Log x 3 81 4 3 x 4 2 81 3 4 x 1 81 3 4 x 81 256 3 4 x 2 81 256 X 5 4 3 81 3 x 4 3x 2 81 119 x 3 mũ 4 81 X 4 81 x 3 synthetic division X 4 81 x 3 long division X 2 4 3 1 81 3 x 9 4 81 3 X 3 2 y 4 2 81 4 x 4 3 x 81 0 X 4 81 x 3 27