[tex]\rule{7cm}{1mm}[/tex]
A = 5(x - 4)
A = 5x - 20
→ Réponse d
B = (3x - 5) × (-4)
B = -12x + 20
→ Réponse c
C = (2x + 5)(3x + 1)
C = 6x² + 2x + 15x + 5
C = 6x² + 17x + 5
→ Réponse b
D = (2x - 7)(3x + 8)
D = 6x² + 16x - 21x - 56
D = 6x² - 5x - 56
→ Réponse a
E = (-7x - 2)(-3x - 9)
E = 21x² + 63x + 6x + 18
E = 21x² + 69x + 18
→ Réponse d