Solve the System by the Substitution or Elimination Method $$\left( \begin{array} { r l r } x ^ { 2 } + 4 y ^ { 2 } & = 25 \\x y & = 6\end{array} \right)$$

Solve the system by the substitution or elimination method. $$\left( \begin{array} { r l r } x ^ { 2 } + 4 y ^ { 2 } & = 25 \\x y & = 6\end{array} \right)$$

A) $\left( 6 , \frac { 3 } { 2 } \right) , \left( - 6 , - \frac { 3 } { 2 } \right) , ( 3,2 ) , ( - 3 , - 2 )$
B) $\left( 4 , \frac { 3 } { 2 } \right) , \left( - 4 , - \frac { 3 } { 2 } \right) , ( 3,2 ) , ( - 3 , - 2 )$
C) $\left( \frac { 3 } { 2 } , 4 \right) , \left( - \frac { 3 } { 2 } , - 4 \right) , ( 2,3 ) , ( - 2 , - 3 )$
D) $\left( 4 , \frac { 3 } { 2 } \right) , \left( - 4 , - \frac { 3 } { 2 } \right) , ( 2,3 ) , ( - 2 , - 3 )$
E) $\left( \frac { 3 } { 2 } , 4 \right) , \left( - \frac { 3 } { 2 } , - 4 \right) , ( 3,2 ) , ( - 3 , - 2 )$

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