Exercice n°2 : Développer les expressions suivantes : A = 2(x + 4) B = -5(3 + x) E = (2x + 1) x 7 F = -3(-5x + 2) C = (x-2,5) x 4 D = -6(3-x) G = 4(6-3x) H = -4

Réponse :

bonjour

Explications étape par étape :

A = 2(x + 4)

=2x+8  (2*x +2*4)

B = -5(3 + x)

-15-5x

E = (2x + 1) x 7

=14x+7

F = -3(-5x + 2)

=15x-6

C = (x-2,5) x 4

=4x-10

D = -6(3-x)

=-18+6x

G = 4(6-3x)

=24-12x

H = -4(5-4x)

=-2 +16x

Réponse:

Bonjour,

A:2*x+2*4

A:2*x+2*4B:-5*3+(-5*x)

A:2*x+2*4B:-5*3+(-5*x)E:(2*x+1)*7

A:2*x+2*4B:-5*3+(-5*x)E:(2*x+1)*7F:-3*-5*x+(-3*2)

A:2*x+2*4B:-5*3+(-5*x)E:(2*x+1)*7F:-3*-5*x+(-3*2)C:4*x-2.5

A:2*x+2*4B:-5*3+(-5*x)E:(2*x+1)*7F:-3*-5*x+(-3*2)C:4*x-2.5D:-6*3-(-6*x)

A:2*x+2*4B:-5*3+(-5*x)E:(2*x+1)*7F:-3*-5*x+(-3*2)C:4*x-2.5D:-6*3-(-6*x)G:4*6+4*3*x

A:2*x+2*4B:-5*3+(-5*x)E:(2*x+1)*7F:-3*-5*x+(-3*2)C:4*x-2.5D:-6*3-(-6*x)G:4*6+4*3*xH:-4*5-(-4*4x)

Bonne journée