Sistemas Cuadráticos

\[x^2 + 5y = -31 \atop -3x + 3y = -27\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 + 2y = 48 \atop 4x + 3y = 8\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 + 3y = 13 \atop 5x + 2y = -22\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 - 2y^2 = -16 \atop -x - 3y = 8\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 + 2y^2 = 57 \atop 3x - y = -19\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 - y^2 = 0 \atop 3x + 2y = -25\]
\[x = \mathbf{?}, y = \mathbf{?}\]