Find the common factors of the given term.
2x , , 4
∵ 2x = 1 × 2 × x = 1 × 2 × x
3x2 = 1 × 3 × x × x = 1 × 3 × x
and 4 = 1 × 2 × 2 = 1 × 2 × 2
∴ the common factor = 1
Note: 1 is a factor of every term.