Any part of an expression that is common to every term in the expression can be factored out. In this case, (3x + 2) is a common term and can be factored out from both parts of the expression:
4y(3x + 2) − 2(3x + 2)
= (3x + 2)[4y − 2] .
Notice that distributing (3x + 2) through [4y − 2] yields the original expression; this verifies the answer.