Răspunsuri

2014-08-07T12:28:27+03:00
12/√2  -14/2√2  + 16/4√2 -18/3√2=

= 12√2/2 - 7√2/2 + 4√2/2 -6√2/2=

= 12√2 -7√2 +4√2 -6√2=

= -13√2 +16√2=  3√2