Cuadrados Perfectos

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

\[x^2 = 9\]
\[x=\boxed{-3, 3}\]

\[x^2 = 81\]
\[x=\boxed{-9, 9}\]

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

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

\[x^2 = \frac{9}{4}\]
\[x=\boxed{\frac{-3}{2}, \frac{3}{2}}\]

\[x^2 + 1 = 10\]
\[x=\boxed{-3, 3}\]

\[x^2 + 1 = 5\]
\[x=\boxed{-2, 2}\]

\[x^2 + 1 = \frac{13}{4}\]
\[x=\boxed{\frac{-3}{2}, \frac{3}{2}}\]

\[2(x^2 + 1) = \frac{218}{9}\]
\[x=\boxed{\frac{-10}{3}, \frac{10}{3}}\]

\[5(x^2 + 1) = 50\]
\[x=\boxed{-3, 3}\]

\[4(x^2 + 1) = 68\]
\[x=\boxed{-4, 4}\]