Pouvez vous m aider SVP

Bonsoir,

A = (2x + 3) (- 4x + 1) + (2x + 3) (8 - x)

A = (2x + 3) (- 4x + 1 + 8 - x)

A = (2x + 3) (- 5x + 9)

B = (4 - 5x) (8x + 1) - (4 - 5x) (7x - 5)

B = (4 - 5x) (8x + 1 - 7x + 5)

B = (4 - 5x) (x + 6)

C = (7 - 2x) (4 + 3x) + (2 - 7x) (3x + 4)

C = (4 + 3x) (7 - 2x + 2 - 7x)

C = (4 + 3x) (- 9x + 9)

D = (9x - 4) (2x + 1) + (9x - 4)²

D = (9x - 4) (9x - 4 + 2x + 1)

D = (9x - 4) (11x - 3)

E = (2x - 9) (x - 7) + 3 (2x - 9)

E = (2x - 9) (x - 7 + 3)

E = (2x - 9) (x - 4)

F = 3 (7x + 1) (4 - 2x) + (5 - x) (7x + 1)

F = (7x + 1) (7x - 17)

Bonsoir, j'aurais plutôt dit cela

* manque le ''-1x'' après le ''-7x²" (réponse F)