Ответ:
[tex]x {}^{2} - 11 = 0[/tex]
[tex]x ^{2} + 14x + 31 = 0[/tex]
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Ответ:
[tex]x {}^{2} - 11 = 0[/tex]
[tex]x ^{2} + 14x + 31 = 0[/tex]