Решить систему уравнений
[tex]\left \{ {{2x^{2} -3xy+2y^{2}=14 } \atop {x^{2} +xy-y^{2}=5}} \right.[/tex]
[tex]\left \{ {{2x^{2} -3xy+2y^{2}=14 } \atop {x^{2} +xy-y^{2}=5}} \right.[/tex]
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