Question

can anyone show me Qno 9 in horizontal method Pls diearies ​

Answer 1

Answer:

$7 {x}^{2} {y}^{2} - 16x {y}^{2} - 8 {x}^{2} y - ( - 3 {x }^{2} + 4 {x}^{2} y - 9xy )\\ 7 {x}^{2} {y}^{2} - 16x {y}^{2} - 8 {x}^{2} y +3 {x }^{2} - 4 {x}^{2} y + 9xy \\ - 8 {x}^{2} y- 4 {x}^{2} y + 7 {x}^{2} {y}^{2} - 16x {y}^{2} +3 {x }^{2} + 9xy \\ 7 {x}^{2} {y}^{2} - 16x {y}^{2} +3 {x }^{2} + 9xy - 12 {x}^{2} y$