Question

Решите плиз яВ1 и В2

Answer 1

Ответ:

$( \sqrt{7 - 2 \sqrt{6} } - \sqrt{7 + 2 \sqrt{6} } ) ^{2} = \\ \sqrt{7 - 2 \sqrt{6} } ^{2} - 2 \times \sqrt{7 - 2 \sqrt{6} } \times \sqrt{7 + 2 \sqrt{6} } + \sqrt{7 + 2 \sqrt{6} } ^{2} = \\ 7 - 2 \sqrt{6} - 2 \times \sqrt{49 - 4 \times 6} + 7 + 2 \sqrt{6} = \\14 - \sqrt{49 - 24} = 14 - \sqrt{25} = 14 - 5 = 9$