One of the simplest ways is to find the last number as it isn't a coefficient of X You can find it by multiplying the 2 numbers in the bracket without X. E.G the 1 from (3x+1) and the 3 from (x+3) so we're looking for 3 as it isn't a coefficient of X for A, (1x3)=3 For B (2x2)=4 for C (2x3)=6 For D (1X2)=2 so the answer is A
