a) ( x + 15 )^2 - 4x^2
b) 1 x^3 - 27
8
c) ( 3x + 2 )^2 - ( x - 1 )^2
d)
( xy + 1 )^2 - ( 1 + x )^2
e) 6x^2 - 2x - 8
g) 8x^3y + 16xy^2 + 12x^2y^2
Loga
Sinh Học lớp 12
