Giải hệ phương trình: \(\left\{ \begin{array}{l}2x + y = 3\\{x^2} + y = 5\end{array} \right.\).
A.\(\left( {x,y} \right) \in \left\{ {\left( {1 + \sqrt 3 ;1 + 2\sqrt 3 } \right),\left( {1 - \sqrt 3 ;1 - 2\sqrt 3 } \right)} \right\}\)
B.\(\left( {x,y} \right) \in \left\{ {\left( {1 + \sqrt 3 ;1 - \sqrt 3 } \right),\left( {1 - \sqrt 3 ;1 + \sqrt 3 } \right)} \right\}\)
C.\(\left( {x,y} \right) \in \left\{ {\left( {1 + \sqrt 3 ;1 - 2\sqrt 3 } \right),\left( {1 - \sqrt 3 ;1 + 2\sqrt 3 } \right)} \right\}\)
D.\(\left( {x,y} \right) \in \left\{ {\left( {1 + 2\sqrt 3 ;1 - 2\sqrt 3 } \right),\left( {1 - 2\sqrt 3 ;1 + 2\sqrt 3 } \right)} \right\}\)
A.\(\left( {x,y} \right) \in \left\{ {\left( {1 + \sqrt 3 ;1 + 2\sqrt 3 } \right),\left( {1 - \sqrt 3 ;1 - 2\sqrt 3 } \right)} \right\}\)
B.\(\left( {x,y} \right) \in \left\{ {\left( {1 + \sqrt 3 ;1 - \sqrt 3 } \right),\left( {1 - \sqrt 3 ;1 + \sqrt 3 } \right)} \right\}\)
C.\(\left( {x,y} \right) \in \left\{ {\left( {1 + \sqrt 3 ;1 - 2\sqrt 3 } \right),\left( {1 - \sqrt 3 ;1 + 2\sqrt 3 } \right)} \right\}\)
D.\(\left( {x,y} \right) \in \left\{ {\left( {1 + 2\sqrt 3 ;1 - 2\sqrt 3 } \right),\left( {1 - 2\sqrt 3 ;1 + 2\sqrt 3 } \right)} \right\}\)
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Hóa Học lớp 12
