How do I factorize and shorten:
\({{18a^2-6a+50)} \over 12ab-20b}\)
When I try it to do it the closest I get is:
\({{2(9a^2-3a+25)} \over b(12a-20)}\)
Hint: 4 is also a common factor of the two terms within parentheses in the denominator.
