Réponses

2013-12-24T16:36:18+01:00
(3+5d)-(-8d+2)
3+5d+8d-2=13d+1

-3e+5+(-6e-3)
-3e+5-6e-3=-9e+2

9c-2-(6c-3)
9c-2-6c+3=3c+1
2013-12-24T17:09:24+01:00
Bonjour

(3+5d)-(-8d+2) = 3 +5d +8d -2 = 13d +1
-3e+5+(-6e-3) = 3e +5 -6e -3 = -3e +2
9c-2-(6c-3) = 9c -2 -6c +3 = 3c +1

Bon père Noêl