Bonjour, pouvez vous m’aider svp ? C’est pour demain.

Bonjour,

A = x (12x - 7y)

A = x * 12x + x * (-7y)

A = 12x² - 7xy

B = 7x²(y - 2)

B = 7x² * y + 7x² * (-2)

B = 7x²y - 14x²

C = 9xy(x + 5)

C = 9xy * x + 9xy * 5

C = 9x²y + 45xy

D = 7t(t² - 2t)

D = 7t * t² + 7t * (-2t)

D = 7t³ - 14t²

E = 5(x + 3x)

E = 5 * x + 5 * 3x

E = 5x + 15x

E = 20x

F = 8xy(9x + 7y)

F = 8xy * 9x + 8xy * 7y

F = 72x²y + 56xy²

G = 10x(x² + 4)

G = 10x * x² + 10x * 4

G = 10x³ + 40x