Question 1085697
{{{a^3-b^3-a^2+b^2}}}<pre>Write it like this:

{{{(a^3-b^3)^""-(a^2-b^2)}}}

Factor the first as a difference of cubes and the second as
a difference of squares. Then there will be a common
factor of (a-b).  You finish.

Edwin</pre>