Give All Solutions of the Nonlinear System of Equations, Including $\begin{array} { l } x y = 20 \\x ^ { 2 } + y ^ { 2 } = 41\end{array}$

question 476

Multiple Choice

Give all solutions of the nonlinear system of equations, including those with nonreal complex components.
$\begin{array} { l } x y = 20 \\x ^ { 2 } + y ^ { 2 } = 41\end{array}$

• A) {(4,5),(5,4),(4,-5),(5,-4)}
• B) {(4,5),(-4,-5),(4,-5),(-4,5)}
• C) {(4,5),(-4,-5),(5,4),(-5,-4)}
• D) {(-4,-5),(-5,-4),(-4,5),(-5,4)}

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