Give All Solutions of the Nonlinear System of Equations, Including $$\begin{array} { l } x y = 18 \\x ^ { 2 } + y ^ { 2 } = 85\end{array}$$

Multiple Choice

Give all solutions of the nonlinear system of equations, including those with nonreal complex components.
- $$\begin{array} { l } x y = 18 \\x ^ { 2 } + y ^ { 2 } = 85\end{array}$$

A) $\{ ( 9,2 ) , ( - 9 , - 2 ) , ( 9 , - 2 ) , ( - 9,2 ) \}$
B) $\{ ( 9,2 ) , ( 2,9 ) , ( 9 , - 2 ) , ( 2 , - 9 ) \}$
C) $\{ ( - 9 , - 2 ) , ( - 2 , - 9 ) , ( - 9,2 ) , ( - 2,9 ) \}$
D) $\{ ( 9,2 ) , ( - 9 , - 2 ) , ( 2,9 ) , ( - 2 , - 9 ) \}$