h lech: (−1/3)² − √1/16 + 1/9

TYol: 1 = − − √9/144 + 16/144 √9/144 + 16/144= √25/144= 5/12 9 1 5 = −− − −−− 9 12 12 45 33 11 = −−− − −− = − −−− = − −− 108 108 108 36