c ) (x + 8)2 -2(x + 8)(x - 2)+(x - 2)2
d) ( x – 3 ) ( x +7 ) – ( x + ) ( x – 1 )
e ) x ( x – 4 ) ( x + 4 ) – ( x2 -1 ) ( x2 + 1 )
f ) ( x +1 ) ( x2 – x + 1 ) – ( x – 1 ) ( x2 + x + 1 )
Loga
Sinh Học lớp 12
