Bonsoir j aurai besoin d aide pour un exercice que je n arrive pas

Bonjour,

A = 5x - 3(x + 12)

A = 5x - 3x - 36

A = 2x - 36

B = 3x - 6 + 7(2x + 4)

B = 3x - 6 + 14x + 28

B = 3x + 14x - 6 + 28

B = 17x + 22

C = 2x² + x(4x - 5)

C = 2x² + 4x² - 5x

C = 6x² - 5x

D = 4x² - x + x(5x - 9)

D = 4x² - x + 5x² -9x

D = 9x² - 10x

Réponse:

A=5x-3x-36

A=2x-36

B=3x-6+14x+28

B=3x+14x-6+28

B=17x+22

C=2x^2+4x^2-5x

C=6x^2-5x

D=4x^2-x+5x^2-9x

D=4x^2+5x^2-x-9x

D=9x^2-10x