Răspunsuri

Cel mai inteligent răspuns!
2014-10-05T14:22:52+03:00
(-3/10+4/15) x 2  1/2=
(-3·3/30+4·2/30)·(2·2+1)/2=
-(9-8)/30·5/2=-1/30·5/2=-1/12
                          

2 5 2