Ответ: -1
[tex](x - 3)(x + 3) - 2x(x + 5) = 1 - {x}^{2} \\ {x}^{2} - 9 - {2x}^{2} - 10x = 1 - {x}^{2} \\ - {x}^{2} - 10x + {x}^{2} = 1 + 9 \\ - 10x = 10 \\ x = - 1[/tex]
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Ответ: -1
[tex](x - 3)(x + 3) - 2x(x + 5) = 1 - {x}^{2} \\ {x}^{2} - 9 - {2x}^{2} - 10x = 1 - {x}^{2} \\ - {x}^{2} - 10x + {x}^{2} = 1 + 9 \\ - 10x = 10 \\ x = - 1[/tex]