Réponses

2013-06-09T21:54:51+02:00

Bonsoir

 

A = 63x-21-27x²+9x = -27x² +72x -21

B = -8 +16y -12y +24y² = 24y² +4y -8

C = -12a-20a²-18-30a = -20a² -42a -18

D = 40z²+10z-56z-14 = 40z² -46z -14