Bonjour
D = (4x - 3) (2x + 5) + (4x - 3) (7x - 1)
D = (4x - 3) (2x + 5 + 7x - 1)
D = (4x - 3) (9x + 4)
E = (- 5x + 3) (2x - 7) - (4x - 1) (- 5x + 3)
E = (- 5x + 3) [(4x - 1) - (2x - 7]
E = (- 5x + 3) (4x - 1 - 2x + 7)
E = (- 5x + 3) (2x + 6)
E = 2 (x + 3) (- 5x + 3)