Răspuns :
(-1/2)^3 = (-1/2)•(-1/2)•(-1/2)=1/4 • (-1/2) = -1/8
-1/8 + 8/15 =
Numitor comun 120
(-1•15+8•8)/120 =
(64-15)/120 =
49/120
-1/8 + 8/15 =
Numitor comun 120
(-1•15+8•8)/120 =
(64-15)/120 =
49/120