Réponses

2013-05-19T12:31:01+02:00

E =  - 4 (x +3) + 5 (6+x) 

E = -4x -12 + 30+ 5x

E= x + 18

 

F = (8+ 2x) * 3 +7 (3x+7)

F = 24 + 6x + 18x+ 7

F = 31 + 24 x 

 

G = 4x (-2x +3) + 2x (3x-6) 

G= -8x +12x +6x - 12x

G= -2x

 

H= 5x (6 -7x) - x (8+2x)

H= 30x - 35x -8x +2x

H= 32x - 43 x

H = -9 x