bonjour je ne comprend pas l'exercice 74 et 75 merci bcp

Bonjour

74
A = (8 - 3 × 2)²
A = (8-6)²
A = 2² = 4

B = 8 - 3 × 2²
B = 8 - 3 × 4
B = 8 - 12 = - 4

♧ Tu termines. ..

75
A = 2 + 3 × 5²
A = 2 + 3 × 25
A = 2 + 75
A = 77

B = (-2^4+3×(-5))/2²
B = (-16-15)/4
B = -31/4
B = - 7,75

Voilà ^^