Algebra
posted by Ella .
I am trying to factor, but I can't seem to get this one. The question is: 15d*2*2d+8. It is actually 15d squared but I didn't know how to right that without it being confusing. Anyways I changed it so now it says 1(15d2d+8). Then I drew a diagram using the factors of 15 and 8 to try to find a pair that equals 2. I found all the factors, but none of them equaled 2. I'm not sure what I did wrong.

You went awry on the minus signs:
15d^22d+8 = (15d^2 + 2d  8)
factoring that will give you
(3d2)(5d+4)