Réponses

2014-03-31T20:50:39+02:00
Bonsoir

D = -15-9(-5+3b) = -15 + 45 - 27b ⇒-27b + 30
E = -5(6-3z)-9+z = -30 + 15z -9 +z = 16z - 39
F = 12x - 4(6-3x) 
= 12x - 24 + 12x = 24x -24

Meilleure réponse !
2014-03-31T21:24:44+02:00
D = -15 -9 (-5 + 3b)
D = -15 + 45 - 27b
D = -27b + 30

E = -5(6 - 3z) - 9 + z
E = -30 + 15z - 9 + z
D = -39 + 16z
D = 16z - 39

F = 12x - 4(6 - 3x) 

F = 12x - 24 + 12x
F = 24x -24