Réponses

2014-10-28T11:04:41+01:00
8/-15 + 12/15 x -35/16
8/-15 -420/240
8/-15 -7/4
32/-60 -105/60
-137/60
2014-10-28T11:07:21+01:00
8/-15 + 12/15 x -35/16= 8/-15 + (3/3 X - 7/4)
= 8/-15 + (-21/12)
= (8 X12)/(-15 X 12) + (-21 X -15) / (12 X -15)
= 96/-180 + 315/ -180
= 411/ -180
= 137/ -60
comment arrive tu as 8/-15 + (3/3 X - 7/4)
????