Réponses

2014-04-20T15:28:03+02:00
1)  (x +(-4))*3+12

a)x=2  -> (2-4)*3+12 = 6
b)x=-5 -> (-5-4)*3+12 = -15
c)x=-5.8 -> (-5.8-4)*3+12 =-17.4

2) calcul litéral car 2*3=6    -5*3=-15  -5.8*3=-17.4