Réponses

2014-04-10T17:36:45+02:00
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