Bonsoir,
Il faut mettre en évidence un facteur commun.
A = 3 - 3x
A = 3 * 1 - 3 * x
A = 3(1 - x)
B = 8m + 8
B = 8 * 1m + 8 * 1
B = 8(m + 1)
C = 6a - 12
C = 6 * a - 6 * 2
C = 6(a - 2)
D = 35 + 7x
D = 7 * 5 + 7 * x
D = 7(5 + x)
E = 18r + 12
E = 3r * 6 + 2 * 6
E = 6(3r + 2)
F = 6n² + 5n
F = n * 6n + n * 5
F = n(6n + 5)
G = 3ab + 6b
G = 3b * a + 3b * 2
G = 3b(a + 2)
H = Tu essaies ? :)
Bonne soirée (;