Question 14320
nx+3mx-2ny-6my
Since there 4 terms, you factor the first two and the second two
x(n+3m) -2y(n+3m)
When you have 4 terms factored, the ( ) should be the same. Then you take what is on the outside, and put them into ( )
(x-2y)(n+3m)  This is your answer