Merci de m'aidé svp :') Ecrire les expressions suivantes sans parantheses A=2x+5(8-x) B=(2x+5)+(8-5x) C=(2x+5)(8-x) D=(2x+5) x(fois) 8-x E=(2x-5)-(8-x)

bonsoir

a = 2 x + 40 - 5 x = - 3 x + 40

b = 2 x + 5 + 8 - 5 x = - 3 x + 13 

c = 16 x - 2 x² + 40 - 5 x = - 2 x² + 11 x + 40

d =  ( 2 x + 5) ( 8 ) - x = 16 x + 40 - x = 15 x + 40 

e = 2 x - 5 - 8 + x = 3 x - 13 

Salut,

A = 2x + 5(8-x)
A = 2x + 40 - 5x
A = -3x + 40

B = (2x+5) + (8-5x)
B = -3x + 13

C = (2x+5)(8-x)
C = 16x - 2x² + 40 - 5x
C = 11x - 2x² + 40

D = (2x+5) × 8 - x
D = 16x + 40 - x
D = 15x + 40

E = (2x-5) - (8-x)
E = (2x-5) - 8 + x
E = 3x - 13

En espérant t'avoir aidé, bonne continuation ;)