Hau thi thanh truc
Giới thiệu về bản thân
F( x x) = - 2 x x3 + 7 - 6 x x + 5 x 4 x 4 - 2 x 3 x 3 F( x x) = (-2 x 3 x 3 - 2 x 3 x 3 ) + 7 - 6 x x + 5 x 4 x 4 F( x x) = -4 x 3 x 3 + 7 - 6 x x + 5 x 4 x 4 F( x x) = 5 x 4 x 4 - 4 x 3 x 3 - 6 x x + 7 G( x x) = 5 x 2 x 2 + 9 x x - 2 x 4 x 4 - x 2 x 2 + 4 x 3 x 3 - 12 G( x x) = (5 x 2 x 2 - x 2 x 2 ) + 9 x x - 2 x 4 x 4 + 4 x 3 x 3 - 12 G( x x) = 4 x 2 x 2 + 9 x x - 2 x 4 x 4 + 4 x 3 x 3 - 12 G( x x) = -2 x 4 x 4 + 4 x 3 x 3 +4 x 2 x 2 + 9 x x - 12 b, F( x x) + G( x x) = 5 x 4 x 4 - 4 x 3 x 3 - 6 x x + 7 + ( -2 x 4 x 4 + 4 x 3 x 3 +4 x 2 x 2 +9 x x-12) F( x x) + G( x x) = 5 x 4 x 4 - 4 x 3 x 3 - 6 x x+ 7 - 2 x 4 x 4 + 4 x 3 x 3 + 4 x 2 x 2 + 9 x x - 12 F( x x) + G( x x) = (5 x 4 x 4 -2 x 4 x 4 ) -(4 x 3 x 3 - 4 x 3 x 3 ) + 4 x 2 x 2 + (9 x x-6 x x) - ( 12 - 7) F( x x) + G( x x) = 3 x 4 x 4 + 4 x 2 x 2 + 3 x x - 5