Réponses

2013-12-16T18:28:05+01:00
A) 2x²=8                                 b)    3x²=27                c) x²-1=0
     x²=8/2                                       x²=27/3                     x²=1
     x²=4                                          x²=9                           x=1
     x=2                                           x=3