Question 16515
Did you want to factor this one?  I'm afraid it doesn't factor, unless maybe you copied the problem wrong.  


Maybe it was supposed to be 
{{{9a^2 -30ab + 25b^2}}}


If this were the case, then it would factor into:
{{{(3a -5b)*(3a-5b)}}} or {{{ (3a-5b)^2}}}


R^2 at SCC