Giải hệ phương trình beginarraylx^2 + x = y^2 + yx^2 +
A.\(\left( {x;\,\,y} \right) \in \left\{ {\left( {\dfrac{{\sqrt {10} }}{2};\,\,\dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( { - \dfrac{{\sqrt {10} }}{2};\,\,\dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( {1;\,\,2} \right),\,\,\left( { - 2;\,\,1} \right)} \right\}\)
B.\(\left( {x;\,\,y} \right) \in \left\{ {\left( {\dfrac{{\sqrt {10} }}{2};\,\,\dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( { - \dfrac{{\sqrt {10} }}{2};\,\, - \dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( {1;\,\,2} \right),\,\,\left( {2;\,\,1} \right)} \right\}\)
C.\(\left( {x;\,\,y} \right) \in \left\{ {\left( {\dfrac{{\sqrt {10} }}{2};\,\,\dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( { - \dfrac{{\sqrt {10} }}{2};\,\, - \dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( {1;\,\, - 2} \right),\,\,\left( { - 2;\,\,1} \right)} \right\}\)
D.\(\left( {x;\,\,y} \right) \in \left\{ {\left( {\dfrac{{\sqrt {10} }}{2};\,\,\dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( { - \dfrac{{\sqrt {10} }}{2};\,\,\dfrac{{\sqrt {10} }}{2}} \right),\,\,\left( { - 1;\,\, - 2} \right),\,\,\left( { - 2;\,\, - 1} \right)} \right\}\)
