qui peut m'aider sur l'exercice 27 page 106 du sésamaths svp​

Bonjour

A = x (x + 6) - x

A = x² + 6x - x

A = x² + 5x

B = x (y - 2) + xy

B = xy - 2x + xy

B = 3xy - 2x

C = 3x (x + 4) - 6x²

C = 3x² + 12x - 6x²

C = - 3x² + 12x

D = 9x (x² - 6) + 2x²

D = 9x³ - 54x + 2x²

D = 9x³ + 2x² - 54x

E = 5x (3 + 5x) + x (5 + x) + 4x (2x + 1)

E = 15x + 25x² + 5x + x² + 8x² + 4x

E = 25x² + x² + 8x² + 15x + 5x + 4x

E = 34x² + 24x

F = 7x (3x - 5) - 6x (7 + 7x)

F = 21x² - 35x - 42x - 42x²

F = 21x² - 42x² - 35x - 42x

F = - 21x² - 77x

G = 9 (3 + 9x) + 4x² (7 - 12x) - 11x (- 5 + 8x)

G = 27 + 81x + 28x² - 48x³ + 55x - 88x²

G = - 48x³ + 28x² - 88x² + 81x + 55x + 27

G = - 48x³ - 60x² + 136x + 27.