Bonjour

tu appliques la distributivité

A = 3 * 1 + 3 * 4 x = 3 + 12 x

B = 28 + 12 x

C = 8 x + 28 x²

D = 2 x - 12

E = - 5 - 10 x

F = - 6 x² + 12 x

G = 21 + 7 y

H = 10 x + 15

I = 4 y + 24