Question

Thực hiện phép tính(3x-5y)(4x+7y)

Answer 1

(3x - 5y)(4x + 7y) =

3x × 4x + 3x × 7y - 5y × 4x - 5y × 7y =

12x² + 21xy - 20xy - 35y² =

12x² + xy - 35y²

Answer 2

Answer:

12x^2 + 1xy -35y^2

Step-by-step explanation:

12x^2 + 21xy -20xy -35y^2 becomes this simplified