et le C= 2×(x-9) et F= (7-4x)×5 Merci !☆​

Bonjour

A = 5 + 4 * (3x - 6)

A = 5 + 12x - 24

A = 12x - 19

B = (2x - 10) * (2x + 10)

B = 4x² - 100

C = 2 * (x - 9)

C = 2x - 18

D = - 3 * (6 + 3x) + x

D = - 18 - 9x + x

D = - 8x - 18

E = (4x - 2) * (3x + 5)

E = 12x² + 20x - 6x - 10

E = 12x² + 14x - 10

F = (7 - 4x) * 5

F = 35 - 20x