Bonjour,

Exercice 73

5*-4 +14 = -20+14 = -6

-4+2 = -2

faux

5*-3 +14 = -15+14 =-1

-3+2 = -1

vrai

5*-2+14 = -10+14 = 4

-2+2 = 0

faux

5*0+14 = 14

0+2 = 2

faux

exercice 74

-(3)²  -5 = 9-5 = 4

1-(-3) =  1+3 = 4

vrai

(-1)² -5 = 1-5 = -4

1-(-1) =  1+1=2

faux

2² -5 = 4-5 = -1

1-2= -1

juste

4² -5 = 16-5 = 11

4-1 = 3

faux