3x 2 5x 12 July 8, 2019 16 32 64 128 3x 2 5x 12 0 3x 2 5x 12 0 quadratic formula 3x 2 5x 12 factorise 3x 2 5x 12 factor 3x 2 5x 12 quadratic formula 3x 2 5x 12 0 by factorisation 3x 2 5x 12 x 4 3x 2 12x 5x 20 3x 2 5x 7 )= 12 3x 3 5x 2 12x 20 3x 3 5x 2 12x 20 0 3x 4 5x 2 12 3 x 3x 2 5x 12 4 3x 2 )- 2x 5x 12