Bonjour ! J'espère vous aider !
Réponse :
V = (2x + 1) (x + 1) (x)
V = (2x*x + 2x*1 + 1*x + 1*1) (x)
V = (2x² + 2x + x + 1) (x)
V = (2x² + 3x + 1) (x)
V = 2x²*x + 3x*x + 1*x
V = 2x³ + 3x² + x
A = (2x + 1) 2 + (x + 1) x + (2x + 1) x
A = 2x*2 + 1*2 + x*x + 1*x + 2x*x + 1*x
A = 4x + 2 + x² + x + 2x² + x
A = 3x² + 6x + 2
