Bonsoir aidez moi svpp je n’arrive pas à faire cette ex de math !

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