Find All Real Solutions to the System of Equations Using $\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 41 \\x - y = 1\end{array}$

Multiple Choice

Find all real solutions to the system of equations using the substitution method.
- $\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 41 \\x - y = 1\end{array}$

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