15 x 3 7x July 8, 2019 16 32 64 128 15 x 3 7x simplified 4 x 3 )= 7x 15 2 *(- x 3 7x 15 X 3 7x 2 7x 15 0 9 5 x )= 15 3 7x X 3 7x 15 180 2 ∙ (- x 3 7x 15 X 3 7x 2 17x 15 15 7x x 1 3 X 3 7x 2 7x 15 factorise
