X 4 = 81 July 8, 2019 16 32 64 128 X 4 81 X 4 81 factored X 4 81 0 X 4 81 18x 2 X 4 81 factor X 4 81x 2 X 4 81 factor completely X 4 81x 2 0 X 4 81x X 4 81 solve X 4 81 factored completely X 4 81 factorise X 4 81 factorizar X 4 81 simplified