Réponses

2013-03-31T19:46:53+02:00

a. (3-5V5)-(8+5V5)=3-5V5-8-5V5=-5-10V5

 


 b. (2-V5)-(1-2V5)=2-V5-1+2V5=1+1V5

 

2013-03-31T20:08:44+02:00

a. 5V5=11,18

3x8+3x11.18 -11.18x-8-11.18x-11.18

24+33.54+89.44-124.9924

21.9876

b. V5=2.23  2V5=4.47

2x1+2x4.47+2.23x-1+2.23x-4.47

3+8.94-2.23-9.9681

-0.2581