Réponses

Meilleure réponse !
2014-04-11T20:19:07+02:00
A = 3x-5+5 (2x+2)
a = 3x-5+10x+10
a = 13x +5

b = 4y -6 (3-2y) +4(y-1)
b = 4y-18+12y+4y-4
b = 20y -22

c =5t² +3 (2t-3) -2t (t-5)
c = 5t²+6t-9-2t²+10t
c= 3t²+16t-9
2014-04-11T20:44:15+02:00
Salut :)

A = 3x - 5 + 5(2x - 2)
A = 3x - 5 + 10x - 10
A = 13x - 15

B = 4y - 6(3 - 2y) + 4(y - 1)
B = 4y - 18 + 12y + 4y - 4
B = 20y - 22

C = 5t² + 3(2t - 3) - 2t(t - 5)
C = 5t² + 6t - 9 - 2t² + 10t
C = 3t² + 16t - 9

J'espère t'avoir aidé(e) ! :)