хелп
1)[tex] \left \{ {{x-y=5} \atop {xy=-4}} \right.
2)\left \{ {{x^2+y^2=29} \atop {-4x^2+y^2=9}} \right. [/tex]
1)[tex] \left \{ {{x-y=5} \atop {xy=-4}} \right.
2)\left \{ {{x^2+y^2=29} \atop {-4x^2+y^2=9}} \right. [/tex]
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