Question 253136
Factors of 3 are 3 and 1
Factors of 36 are 1,36: 2,18: 3,12: 4,9: 6,6
We need a way to get these to add to 31. The obvious try is 3 x 9 and 4 x 1
So the factors are (3x + 9)(x + 4)= 0
Therefore x = -3 or -4