8.a) 6/35 la puterea 40
b)60/75 la puterea 86
c)300/300 la puterea 34
d)900/900 la puterea 30
e)175/448 la puterea 62
f)27/192 la puterea 32
10. 4/18+9/18+16/18=>x=29/18
11. (5/9+2/9)(5/9-2/9)=25/18-4/18=21/18(am calculat direct a la a 2 a - b la a 2 a)
Sper ca te-am ajutat! Coroana:D