[tex]{x}^{3} + 3 {x}^{2} - x - 3 = 0 \\ {x}^{2} \times (3 + x) - (3 + x) = 0 \\ ( {x}^{2} - 1)(x + 3)[/tex]
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[tex]{x}^{3} + 3 {x}^{2} - x - 3 = 0 \\ {x}^{2} \times (3 + x) - (3 + x) = 0 \\ ( {x}^{2} - 1)(x + 3)[/tex]
Відповідь: 1)