Question

(5x- 3) (X + 4) - (2 X + 5) (3 X - 4)​

Answer 1

⭐Answer

(5x-3) (x+4) -(2x+5) (3x-4)

→ 5x(x-4) -3(x+4) -(2x+5) (3x-4)

→ 5x²-20x-3x-12-(2x+5) (3x-4)

→ 5x²-23x-12-2x(3x-4) +5(3x-4)

→ 5x²-23x-12-6x²+8x+15x-20

→ 5x²-23x-12-6x²+23x-20

→ 5x²-6x²-23x+23x-12-20

→ -x²-32

Answer 2

Answer:

$= (5x(x + 4) - 3(x + 4) ) - ((2x(3x - 4) + 5(3x - 4)) \\ \\ = (5 {x}^{2} + 20 - 3x - 12) - (6 {x}^{2} - 8x + 15x - 20) \\ \\ = 5 {x}^{2} + 20 - 3x - 12 - 6 {x}^{2} + 8x - 15x + 20 \\ \\ = 5 {x}^{2} - 6 {x}^{2} - 3x + 8x - 15x + 20 - 12 + 20 \\ \\ = - 3 {x}^{2} - 10x + 28$