bonjour pouvez vous m’aidez svp

Bonjour,

Exercice 2 :

a. 2a-3 = -5a+11

Pour a = 2

2×2-3 = -5×2+11

4-3 = 10+11

1 = 1. Vrai

b. 4b-2 = -b+1

Pour b = -1

4×(-1)-2 = -(-1)+1

-4-2 = 1+1

-6 = 2. Faux

c. 3c(2c-5) = d²+2

3×(-5)×(2×(-5)-5) = (-2)²+2

3×(-5)×(-10-5) = 4+2

3×(-5)×(-15) = 6

225 = 6. Faux