Réponses

2014-05-16T17:37:30+02:00
A= 7x - 3(4x - 5)
A=7x-12x+15
A=-5x+15

B= 3(x + 7) - (x + 5)
B=3x+21-x+5
B=2x+26

C= 4(x - 3) + 2(x - 7)
C=4x-12+2x-14
C=6x-26

D= 4x - 6x (x-1)
D= 4x-6x²+6x
D=-6x²+10x

E= 2x(3x+4) - x(5x-3)
E=6x
²+8x-5x²+3x
E=x²+11x