Question

Simplify (5x + 3)(2x - 3) - (7x + 3y)(x - 4y) .​

Answer 1

Step-by-step explanation:

this is the answer

Answer 2

$= (5x + 3)(2x - 3) - (7x + 3y) \\ (x - 4y)$

$(5x + 3)(2x - 3) \\ \\ = 5x(2x - 3) + 3(2x - 3) \\ \\ = 10 {x}^{2} - 15x + 6x - 9 \\ \\ = 10 {x}^{2} - 11x - 9$

$= (7x + 3y)(x - 4y) \\ \\ = 7x(x - 4y) + 3y(x - 4y) \\ \\ = 7 {x}^{2} - 28xy + 3xy - 12 {y}^{2} \\ \\ = 7 {x}^{2} - 25xy - 12 {y}^{2}$

$= 10 {x}^{2} - 11x - 9 - 7 {x}^{2} \\ - 25xy - 12 {y}^{2} \\ \\ = 3 {x}^{2} - 11x - 9 - 25xy - 12 {y}^{2}$