Алгебра 9 класс система уравнений
Подробно пожалуйста

[tex] {x}^{2} + 2xy = - 1 \\ 4xy + 9 {x}^{2} = 5[/tex]
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[tex] {x}^{3} {y}^{3} + {x}^{2} {y}^{4} = 12 \\ {x}^{4} {y}^{2} + {x}^{3} {y}^{3} = 24[/tex]
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