Réponses

2013-02-20T10:54:49+01:00

B = -(1/3x+2) + (5x-3) 

b = - (x/3+2) + (5x-3)

B = - (3x/3+6/3) +(15x/3-9/3)

B = -3x-6+15x-9 = 12x -15

 

C = (2/3x+1/3)- (5/6+2/6x)

C = (4x/6+2/6) - (5/6+2x/6)

C = 4x+2-5-2x = 2x-3

 

D = 1/2+2x - (x-3/2)

D = 1/2+4x/2 - (2x/2-3/2)

D = 1+4x-2x+3

D = 2x+4