A = 2009 x 2009 x 20082008 - 2008 x 2008 x 20092003/2008 x 20072007
A = 4,036,081 x 20,082,008 - 2008 x (2008 x 20,092,003/2008) x 20,072,007
A = 81,052,610,930,648 - 2,008 x 20,092,003 x 20,072,007
A = 81,052,610,930,648 - 40,344,742,024 x 20,072,007
A = 81,052,610,930,648 - 809,799,944,318,922,168
A = - 809,718,891,707,991,520.
Chúc bạn học tốt nhé !