Question

expand and simplify each of the following expressions (7x-3y) (x_4y)+(5x_9y)(y_2x)

plz help me in this question ​

Answer 1

Step-by-step explanation:

$= (7x - 3y)(x - 4y) + (5x - 9y)(y - 2x) \\ = 7 {x}^{2} - 28xy - 3xy + 12 {y}^{2} + 5xy - 10 {x}^{2} - 9 {y}^{2} + 18xy \\ = - 3 {x}^{2} + 3 {y}^{2} + 23xy - 31xy \\ = - 3 {x}^{2} + 3 {y}^{2} - 8xy \\ = - (3 {x}^{2} - 3 {y}^{2} + 8xy)$

HOPE THIS HELPS

MARK ME BRAINLIEST