Find All Real Solutions to the System of Equations Using $\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 41 \\x + y = 9\end{array}$

Multiple Choice

Find all real solutions to the system of equations using the substitution method.
- $\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 41 \\x + y = 9\end{array}$

A) (-5, 4) , (-4, 5)
B) (5, 4) , (4, 5)
C) (5, -4) , (4, -5)
D) (-5, -4) , (-4, -5)