Réponses

2013-05-01T11:23:52+02:00

B = (5 - x/2)(2x - 4)

B = (5 - x/2*2)(2x - 4)

B = (5 - x)(2x - 4)

B = 10x - 20 - 2x² + 4x

B = -2x² + 14x - 20

 

C = (9 - 6x)(-2 + 2x/3) 

C = (9 - 6x)(-2 + 2x/3*3)

C = (9 - 6x)(-2 + 2x)

C = -18 + 18x + 12x - 12x²

C = -12x² + 30x - 18

 

D = (12a - 18)(1/4 + 2x/3)

D = (12a - 18)(1/4 + 2x/3*3)

D = (12a - 18)(1/4 + 2x)

D = 3a + 24ax - 4,5 - 36x