by jnelson0612 Sat Jul 02, 2011 12:16 pm
Hi Tara!
Step 1: Rewrite the problem this way:
12ab^3 minus
3ab
6a^2b
3ab
Now, can you cross cancel common terms out of each? I see that on the top and bottom of each of these two I have a factor of 3, an "a", and a "b". See if you can cross cancel and let me know if you need more help.
Jamie Nelson
ManhattanGMAT Instructor