Réponses

2013-10-29T14:31:48+01:00
A= x²+3x+4x+12
A=x²+7x+12

B=2y²+8y+6y+24
B=2y²+14y+24

C=15z-18z²+20-24z
C=-18z²-9z+20

D= -21t+35t²+24-40t
D=35t²- 61t+24
Voilà :)