Question

add. (3x ^ 2 * y + 4x ^ 2 * y ^ 2 - 7x * y ^ 2) + (9x ^ 2 * y - x ^ 2 * y ^ 2 + 3x * y ^ 2) ​

Answer 1

$20x^{2} y - xy^{2} -4x^{2} y^{2}$

I hope I did this correctly, I also hope it helps you :)

Answer 2

Answer:

$xy(12x + 3xy - 4y)$

Step-by-step explanation:

By opening the brackets we get

$3 {x}^{2}y + 4 {x}^{2} {y}^{2} - 7x {y}^{2} + 9 {x}^{2} y - {x}^{2} {y}^{2} + 3x {y}^{2} \\ 12 {x}^{2} y + 3 {x}^{2} {y}^{2} - 4x {y}^{2} \\ xy(12x + 3xy - 4y)$