Bonsoir, aidez moi ! Svp C du niveau 3eme . C les 3 exos

Bonsoir,

Exercice 1 :

A = 5(2x-7)

A = 10x-35

B = -4(-3x+1)

B = 12x -4

D = 5x -5(-2x+1)

D = 5x +10x-5

D = 15x -5

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

E= 6x+10-4x-8

E = 2x+2

Exercice 2 :

A = (x+3)(x+4)

A = x²+4x+3x+12

A = x²+7x+12

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

B= -2x²+4x+3x-6

B = 2x²+7x-6

C = (-4x+3)(2x+1)

C= -8x²-4x+6x+3

C = -8x²+2x+3

D = (7x-2)(5x-4)

D= 35x²-28x-10x+8

D = 35x²-38x+8

E = (-3x-4)(8x-7)

E = -24x²+21x-32x+28

E = -24x²-11x+28

Exo 3 :

A = 5+(2x-7)(4-3x)

A = 5+ (8x-6x²-28-21x)

A = 5 -6x²+29x-28

A = -6x²+29x-23

B = 3-(4x+1)(-x+2)

B= 3-(-4x²+8x-x+2)

B = 3- (-4x²+7x+2)

B = 3+4x²-7x-2

B= 4x²-7x+1

C= 5x-1 + (2x-3)(3x+1)

C = 5x-1 + (6x²+2x-9x-3)

C = 5x-1+6x²-7x-3

C = 6x²-2x-4

D = 4x²- (-5x+2)(x-3)

D = 4x²-(-5x²+15x+2x-6)

D = 4x²-(-5x²+17x-6)

D = 4x²+5x²-17x+6

D = 9x²-17x+6

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

E= 2x²+10x-3x-15-8x+4

E = 2x²-x-11

Bonne soirée