Réponses

2013-05-29T13:35:33+02:00

Bonjour

 

A = xy-2x+xy = 2xy -2x

B = 7x²+14x +36x² = 43x² +14x

C = 9x^3 -54x +2x² = 9x^3 +2x² -54x

D = 6x+10x²+56x-8x²+4x-4 = 2x² +66x -4