Bonjour,
A = 4x² + 5x
A= 4x * x + 5 * x
A = x(4x + 5)
B = (7x + 1)(3x + 2) + (7x + 1)(4x - 8)
B = (7x + 1)(3x + 2 + 4x - 8)
B = (7x + 1)(7x - 6)
C = (2x + 1)(3x - 2) - (4x - 3)(3x - 2)
C = (3x - 2)(2x + 1 - (4x - 3))
C = (3x - 2)(2x + 1 - 4x + 3)
C = (3x - 2)(4 - 2x)
Bonne journée.
