A=(2008+2)x2010 B=2008+(2010+2)
=2008x2010+2x20 =2008x2010+2008x2
Vì 2008x2<2010x2=>A>B
Ta có: A = 2010 x 2010 = 2010 x ( 2008 + 2 ) = 2010 x 2008 + 2010 x 2
B = 2008 x 2012 = 2008 x (2010 + 2) = 2008 x 20010 + 2008 x 2
Vì 2010 x 2008 + 2010 x 2 > 2008 x 2 nên 2010 x 2010 > 2008 x 2012