Quandaries
and Queries 

Why does "a"cubed minus "b"cubed equal (ab) times I know this is a formula, but why is it true? Denise 

Hi Denise, Factoring is often a matter of looking at an expression and seeing a pattern, or recognizing something you have seen before. For example the fact that I know twentyfour is six times four is that when I learned my times tables I learned that
and I can read it backwards to get
The same is true for a^{3}  b^{3} . I know that if I multiply
I get
and I can read it backwards to get
Penny 

