Factorise m 4 81 July 8, 2019 16 32 64 128 Factorise x 4 81 Factorise x 4 81y 4 X 4 9x 2 81 factorise Factorise 16 x 4 81 Factorise 81x square - 36 x + 4 Factorise fully x 4 81 Factorise x square 4 x 4 81 Factorise 81x ^ 4 - 121x ^ 2 Factorise x ki power 4 81