Question

3x2y,-6xy,9y2x,8yx2,8yx2,-7yx​

Answer 1

$3 {x}^{2} y - 6xy + 9 {y}^{2}x + 8y {x}^{2} + 8y {x}^{2} - 7yx \\ = 3 {x}^{2} y - 13xy + 9 {y}^{2} x + 16y {x}^{2}$