Réponses

2014-02-17T15:42:10+01:00
 2V45-5V20-V80  = 2V9x5 - 5V4x5 -V16x5
                             = 2x3V5 - 5x2V5 - 4V5
                             = 6V5 -10V5 -4V5
                             = -8V5