GoldmanYT Ответ:[tex] a - 7 [/tex]Объяснение: [tex] \frac {a ^ 2 - 2} {a + \sqrt {2}} - \sqrt {(\sqrt {2} - 7) ^ 2} = \\ = \frac {(a - \sqrt {2}) (a + \sqrt {2})} {a + \sqrt {2}} - |\sqrt {2} - 7| = \\ = a - \sqrt {2} - (7 - \sqrt {2}) = \\ = a - 7 [/tex]