Réponses

2014-02-21T20:38:45+01:00
Exercice 1/ 
A= -18x+54-2x²+6x
A= -2x²-12x+54

B= -24x+8x²-(-8x-2x²-56-14x)
B= -24x+8x²+8x+2x²+56+14x
B= 10x²-2x+56

C= 2a-2a+15ab-10+b
C= 15ab-10+b