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Solve the Nonlinear System of Equations for Real Solutions {x2+2y2=7xy=9\left\{ \begin{array} { l } x ^ { 2 } + 2 y ^ { 2 } = - 7 \\x - y = - 9\end{array} \right.

Question 121

Multiple Choice

Solve the nonlinear system of equations for real solutions.
- {x2+2y2=7xy=9\left\{ \begin{array} { l } x ^ { 2 } + 2 y ^ { 2 } = - 7 \\x - y = - 9\end{array} \right.


A)
(9+3453,18+3453) ,(9+3453,183453) ,(93453,18+3453) \left( \frac { 9 + \sqrt { 345 } } { 3 } , \frac { - 18 + \sqrt { 345 } } { 3 } \right) , \left( \frac { 9 + \sqrt { 345 } } { 3 } , \frac { - 18 - \sqrt { 345 } } { 3 } \right) , \left( \frac { 9 - \sqrt { 345 } } { 3 } , \frac { - 18 + \sqrt { 345 } } { 3 } \right) , {93453,183453}\left\{ \frac { 9 - \sqrt { 345 } } { 3 } , \frac { - 18 - \sqrt { 345 } } { 3 } \right\}
B)
{18+3453,9+3453) ,(18+3453,93453) ,(183453,9+3453) \left\{ \frac { - 18 + \sqrt { 345 } } { 3 } , \frac { 9 + \sqrt { 345 } } { 3 } \right) , \left( \frac { - 18 + \sqrt { 345 } } { 3 } , \frac { 9 - \sqrt { 345 } } { 3 } \right) , \left( \frac { - 18 - \sqrt { 345 } } { 3 } , \frac { 9 + \sqrt { 345 } } { 3 } \right) ,
18- 18 \varnothing
C) \varnothing
D) (0,0) ( 0,0 )

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