Répondre :
Pour le 1:
(4x - 1) (3x - 5) + (4x - 1)²
(4x - 1) [(3x - 5) + (4x - 1)]
(4x - 1) [3x - 5 + 4x - 1]
(4x - 1) [7x - 6]
Le 2e:
(2x + 1) (5x - 4) + (2x + 1)
(2x + 1) [(5x - 4) + (2x + 1)]
(2x + 1) [5x - 4 + 2x + 1]
(2x + 1) (7x - 3)
(4x - 1) (3x - 5) + (4x - 1)²
(4x - 1) [(3x - 5) + (4x - 1)]
(4x - 1) [3x - 5 + 4x - 1]
(4x - 1) [7x - 6]
Le 2e:
(2x + 1) (5x - 4) + (2x + 1)
(2x + 1) [(5x - 4) + (2x + 1)]
(2x + 1) [5x - 4 + 2x + 1]
(2x + 1) (7x - 3)