1.
(√13 - √2) • √(15 + (2√26)) =
= √((√13 - √2)^2 • (15 + 2√26)) =
= √((13 - 2√26 + 2) • (15 + 2√26)) =
= √(15•13 - 15•2√26 + 15•2 + 13•2√26 -
- (2√26)•(2√26) + 2•2√26) =
= √(195 - 30√26 + 30 + 26√26 - 104 + 4√26)=
= √121 = 11
Ответ: 11.
2.
2 2/3 - 5 1/2 - 2 1/6 =
8/3 - 7/2 - 13/6 =
= 16/6 - 21/6 - 13/6 =
= (16 - 21 - 13)/6 =
= (-18)/6 = -3
Ответ: -3