Posted by jerson on Monday, November 10, 2008 at 8:16pm.
expand (x + y)^5

trig(really struggling with this problem)  bobpursley, Monday, November 10, 2008 at 8:18pm
Use the binomial expansion, or better, Pascals triangle...
http://library.thinkquest.org/C0110248/algebra/biexpintro.htm