Sagot :
a. (3-5V5)-(8+5V5)=3-5V5-8-5V5=-5-10V5
b. (2-V5)-(1-2V5)=2-V5-1+2V5=1+1V5
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