1 -12 -1 12 2 -6 -2 6 3 -4 -3 4 -3 4 Decide which pair adds up to b ie +1 Replace the x term by these two values ie -3x and 4x so 6x2 + x – 2 becomes 6x2 + 4x -3x -2 Now factorise it as a four term expression 6x2 + 4x -3x -2 = 2x (3x + 2) +1 (...