a) -2x 2 y 3 .(3xy 2 – 2xy – 1)
b) (x -2)(x+2)( x 2 + 4)
c) (x – 2)(x 2 + 2x +4)
d) (x 2 – 3x+9)(x +3) e) (x+5y) 2 f) (x – 2) 3
Loga
Sinh Học lớp 12
