Thursday, May 16, 2013

Evaluate (1+x)^2=

FOIL is really popular, but I prefer straight distribution: 
(1+x)^2= 
(1+x)(1+x)= 
1(1+x)+x(1+x)= 
1+x+x+x^2= 
1+2x+x^2 

:)
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