You can put this solution on YOUR website! 3cd – 6cy + 2xd – 4xy
Start by grouping the terms (that have similar factors):
[3cd – 6cy] + [2xd – 4xy]
factoring terms inside the brackets:
3c[d – 2y] + 2x[d – 2y]
finally, pulling out the (d-2y):
(d-2y)(3c+2x)
.
Your choice would be: 3