Réponse:
1) A = 64
2) A = 7
3) A = 4
4) A = 55
Explications étape par étape:
1) x = -4
A = -4 (-4 -1) + 2×(-4)² - 3×(-4)
A= -4×(-5) + 2×16 + 12
A= 20 + 32 + 12
A = 64
2) x = -1
A = -1 (-1 -1) + 2×(-1)² - 3×(-1)
A = -1×(-2) + 2×1 + 3
A = 2 + 2 + 3
A = 7
3) x = 2
A = 2 (2 - 1) + 2×2² - 3×2
A = 2×1 + 2×4 - 6
A = 2 + 8 - 6
A = 4
4) x = 5
A = 5 (5 - 1) + 2×5² - 3×5
A = 5×4 + 2×25 - 15
A = 20 + 50 - 15
A = 55
