Resumen

\[x^2 = 25\]
\[x=\boxed{-5, 5}\]

\[x^2 = \frac{1}{4}\]
\[x=\boxed{\frac{-1}{2}, \frac{1}{2}}\]

\[x^2 + 1 = 17\]
\[x=\boxed{-4, 4}\]

\[x^2 + 1 = \frac{97}{16}\]
\[x=\boxed{\frac{-9}{4}, \frac{9}{4}}\]

\[( x + 6 ) ( x + 3 ) = 0\]
\[x=\boxed{-6, -3}\]

\[( x - 1 ) ( x - 1 ) = 0\]
\[x=\boxed{1, 1}\]