Răspunsuri

2014-09-07T11:21:14+03:00
0,25+78:4-8V5:V5-3*7V2=0,25+19,5-8-21V2=11,75-21V2

3V2(2+V2)-5*3,5V6+11:(7-1,5)=6V2+3*V2V2-17,5V6+11:6,5=6V2+6-17,5V6+11:6,5=
6V2+7,69-17,5V6
Obs: 11:6,5≈1,69

2014-09-07T11:35:45+03:00
1. 0,25 + 78:4 - 8√5 : √5 - 3·7√2
0,25+ 19,5 -8 - 21√2
= 11,75 - 21√2

2. 3√2 (2+√2) - 5 (3.5√6) + 11 : ( 7-1,5)
6√2 + 6 - 17,5√6 + 11 : 5,5
6√2 + 6 -17,5√6 + 2
= - 11,5√6 + 8