Exercice 3 Développer et réduire :
A = 2(6a + 8)
B = (5x + 2)x11
C = 9(4t + 6) + 2
D = 3(9z + 4) E = 3a(3a + 3)
Exercice 4
A = 2(8c + 8)
B = (8z + 2)×(-7)
C = 7(5c-1) + 4
D = -10(2a - 3)
E = -8b(5b-4)​