Bonjour.
Exercice 3 :
A = 4x + 28
A = 4 × (x + 7)
B = 2/3x + 14/3
B = 2/3 × (x + 7)
C = 0,5x + 3,5
C = 0,5 × (x + 7)
D = - 5x - 35
D = - 5 × (x + 7)
Exercice 4 :
E = 3x² + 5xy
E = x × (3x + 5y)
F = 25ab - 10a² + 30a
F = a × (25b - 10a + 30)
G = 4x × (5 + 3x) + 7 × (5 + 3x)
G = (5 + 3x)(4x + 7)
Exercice 5 :
M = (x + 2)(x - 4) + (x + 2)(x - 5)
M = (x + 2)(x - 4 + x - 5)
Bonne journée :)
