Răspunsuri

2014-06-20T13:11:30+03:00
5+2√10+2-√10-2-√10+10=

=15 +2-2 +2√10-2√10=

=15+2√10-2√10 =15
2014-06-20T13:11:59+03:00
(√5+√2)^2 -√2(√5+√2)-√5(√2-2√5) =
5 + 2√10 + 2-
√10 - 2 - √10 + 10 = 5 + 10 = 15