Réponse :

Explications étape par étape

Bonjour

Developper puis réduire :

A = x(x + 6) - x

A = x^2 + 6x - x

A = x^2 + 5x

B = x(y - 2) + xy

B = xy - 2x + xy

B = 2xy - 2x

C = 3x(x + 4) - 6x^2

C = 3x^2 + 12x - 6x^2

C = -3x^2 + 12x

D = 9x(x^2 - 6) + 2x^2

D = 9x^3 - 54x + 2x^2

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

E = 15x + 25x^2 + 5x + x^2 + 8x^2 + 4x

E = 34x^2 + 24x

F = 7x(3x - 5) - 6x(8 + 7x)

F = 21x^2 - 35x - 48x - 42x^2

F = -21x^2 - 83x

G = 9(3 + 9x) + 4x^2(7 - 12x) - 11x(-5 + 8x)

G = 27 + 81x + 28x^2 - 48x^3 + 55x - 88x^2

G = -48x^3 - 60x^2 + 136x + 27