pouvez vous m'aider svp 1) Réduire chaque expression: A 2x + 3x B 14x - 4x C = 2x - 7x = D = 14x - 14x = E=X - 9x = F = y + y = G = 3x + x + 2x = H = x + x + x

Réponse :

Explications étape par étape

A =2x + 3x  =5x

B = 14x - 4x  =10x

C = 2x - 7x =  -5x

D = 14x - 14x =  0

E=X - 9x =  -8x

F = y + y =  2y

G = 3x + x + 2x =  6x

H = x + x + x =  3x

1 = 3 + 2x + 7 =  2x + 10

J = 3-5x + 2x =  3 - 3x

K = 5x - 4 - 3x = 2x - 4

2.

A=X+ (5 - 3x) =  x + 5 - 3x = 5 -2x

B = 8 + (-2x + 3) =  8 - 2x +3 = 11 - 2x

C=7 - (x + 3) =  7 - x -3 = 5 - x

D= 11 - (-x + 9) =  11 +x - 9 = 2 +x

E = -x - (2 + 2x) =  -x -2 -2x = -2 -3x

F=1-(-11 - x) =  1 + 11 +x = 12 + x

G=-5x + (7 + 5x) =  -5x + 7 +5x = 7

H= 4 + (-11% - 4) =  4 -11x -4 = -11x

I = 5x + (-5 + 2x) =  5x - 5 + 2x = 7x -5

J = -7x + (3x - 1) + (5 - x) =  -7x + 3x -1 +5 -x = -4x +4

K=x2-(3x? - 15x + 4) + (15x - 12x - x) =​ x² - 3x -15x +4 +15x - 12x -x = x² - 16x +4

Réponse:

1) A= 2x + 3x = 5x

B = 14x - 4x = 10x

C = 2x - 7x = -5x

D = 14x - 14x = 0

E = x - 9x = -8x

F = 2y

G = 3x + x + 2x = 6x

H = x + x + x = 3x

I = 3 + 2x + 7 = 2x + 10

J = 3 - 5x + 2x = -3x + 3

K = 5x - 4 - 3x = 2x - 4

2) A= x + 5 - 3x = -2x + 5

B= -2x + 3 + 8 = +2x + 11

C = 7 - x - 3 = -x - 4

D = 11 - x - 9 = -x + 2

E = -x - 2 -2x = -3x - 2

F = 1 + 11 + x = x + 12

G = - 5x + 7 + 5x = 7

H = 4 -11x - 4 = -11x

I = 5x - 5 + 2x = 7x -5

K = x² - 12x + 2x = x² - 10x

voilà (✿^‿^) je ne suis pas du tout sur pour le 2) mais le 1) devrait être juste