Réponses

2014-01-11T13:06:10+01:00
a) x=0
A= -5*0 + 7
=7

b) x=1
 
A= -5*1+ 7
=-5+7
=2

c) x=3
A= -5*3 + 7
=-15+7
=-8

d) x=-3 
A= -5*(-3) + 7
=15+7
=22
2014-01-11T13:06:42+01:00
A= -5x + 7

Calculer la valeur de l'expression A pour : 

a) x=0  A = 7
b) x=1   A= -5 + 7 = 2
c) x=3   A = -15 +7 = -8
d) x=-3  A = 15+7 = 22