Réponses

2014-10-29T18:51:47+01:00
A=2x(x+3)=2X2+6x
B=2X2+8X-5X-20=2X2+3X-20
C=X2-6X+4X-24-X+7+X2-7X=2X2-10X-17
2014-10-29T18:52:15+01:00