Posted by Sandra on Monday, July 13, 2009 at 8:32pm.
Reduce each rational expression to lowest terms. Assume that the
variables represent only numbers for which the denominators are
nonzero.
a^2b^2/ab

algebra  Marth, Monday, July 13, 2009 at 10:05pm
I assume you mean (a^2b^2)/(ab)
a^2  b^2 factors to (ab)(a+b) by the difference of two squares.
You now have (ab)(a+b)/(ab). The (ab) cancel out, leaving you with (a+b)