Question 1067827
Binomial Theorem?  Pascal's Triangle?  If you are not sure how to use them for help, try polynomial Division.  Divide your cubic expression by {{{a+b}}} and you should be able to find a quotient which is a more easily factorable quadratic expression.


<pre>

          a^2     2ab       b^2
     _______________________________________
a+b  |    a^3  +  3a^2*b  +3b^2a  +  b^3
     |
     |    a^3     a^2*b
      ------------------
           0      2a^2*b   3b^2*a 
                  2a^2*b   2a*b^2
                 ----------------
                    0       ab^2     b^3
                            ab^2     b^3
                           ---------------
                             0        0

</pre>
That quotient is  {{{a^2+2ab+b^2}}}.