Réponses

2013-04-03T21:40:11+02:00

a)

 

2-(t-3)+4(t-1)

2-t+3+4*t+4*(-1)

2-t+3+4t-4

3t+1

 

b)

 

5(t+1)-2(t+2)

5*t+5*1-2*t-2*2

5t+5-2t-4

3t+1