Question

Помогите пжжж дам 20балов!!!!!!!​

Answer 1

Ответ:

$\frac{7 - \sqrt{7} }{ \sqrt{14} - 7 \sqrt{2} } = \frac{7 - \sqrt{7} }{ \sqrt{7} \times \sqrt{2} - 7 \sqrt{2} } = \frac{7 - \sqrt{7} }{ \sqrt{2}( \sqrt{7} - 7) } = - \frac{7 - \sqrt{7} }{ \sqrt{2}(7 - \sqrt{7} ) } = - \frac{1}{ \sqrt{2} }$

${x}^{2} = \sqrt{36} + \sqrt{100} \\ {x}^{2} = \sqrt{ {6}^{2} } + \sqrt{ {10}^{2} } \\ {x}^{2} = 6 + 10 \\ {x}^{2} = 16 \\ x1 = - 4 \\ x2 = + 4$