15 =- 3 (- 2x 7 July 8, 2019 16 32 64 128 15 2x 3 7 x 2x 3 7x 15 4 15 3 2x 4 ))- 13 7 x 1 )- 39 2x 3 7x 15 180 5 2x 3 )= 7x 15 7 3 2x )= 15 1 x 3x 15 2x 7 )= 3 15 4x 3 2x 7 15 2x 7 3 5 2x 3 7x 15 2 2x 3 7x 15 3 1 2x2 7x 15 2x 3 Factorise 2x 3 7x 15
