Thực hiện phép chia:

b) (7x⁴y² – 2x²y² – 5x³y⁴) : (3x²y).

b) (7x⁴y² – 2x²y² – 5x³y⁴) : (3x²y)

= [(7x⁴y²) : (3x²y)] – [(2x²y²) : (3x²y)] – [(5x³y⁴) : (3x²y)]

= (7 : 3).(x⁴ : x²).(y² : y) – (2 : 3).(x² : x²).(y² : y) – (5 : 3).(x³ : x²).(y⁴ : y)

= x²y – y – xy³.