I'm guessing it's asking you to multiply 35 and 55 with the greatest common factor, which in that case the greatest common factor is 5. So it would look something like 5(35+55), and when you multiply using the distributive property it would end up being 175 + 275 (because (5x35) + (5x55)). I hope this helps, but I'm not 100% sure what the question is asking; this is just what I understand from it.