Réponse:
A = 53
B = 149
C = 63
D = 243
Explications étape par étape:
A = 3 × 16 + 5
= 48 + 5
= 53
B = 12² + 5
= 144 + 5
= 149
C = 3 × (16 + 5)
= 3 × 21
= 63
D = 3 × 9²
= 3× 81
= 243
