Hoặc
b) (x2y2+16x3y2−x5y4):(12xy2).
b) (x2y2+16x3y2−x5y4):(12xy2)
=x2y2:(12xy2)+16x3y2:(12xy2)−x5y4:(12xy2)
=2x+13x2−2x4y2.