Bonjour j’ai un dm en maths pouvez vous m’aider pour l’exercice 2 et 3 svp merci d’avance.

Voilà regarde la photo

Bonjour, je vais essayer de t'aider :

Exercice 2

A= 11+2(x-6) = 11 +2x -12 = 11-12+2x = 2x-1

B = -3(2y-4) - 2y = -6y +12 - 2y = 12 -6y-2y = 12-8y

C = -5(6-3z) -9+z = -30 +15z-9+z = 15z+z-30-9= 16z -39

D = x(x+6)-x = x ² +6x-x =x ² + 5x

E  = x(y-2) +xy = xy- 2x+xy = xy+xy-2x =2xy -2x

F  = 5x(3+5x) +x(5+x) +4x(2x+1) = 15x+25x²+5x+x²+8x²+4x = 25x²+8x²+x²+15x+5x+4x = 34x²+24x

Exercice 3 :

I = (x+1)(x+5) = x²+5x+x+5 =x²+6x+5

J = (4x+5)(2x+6) = 8x²+24x+10x+30 = 8x²+34x+30

K =(5u+1)(2-3u) = 10u-15u²+2-3u = 10u-3u -15u²+2 = 7u-15u²+2

L  = (-3+n)(-2n-5) = 6n+15-2n²-5n = 6n-5n-2n²+15 =n-2n²+15

Voilà j’espère que tu as compris... Bon courage... Salut