Solución 1
\[x^2 = 49\]
\[x=\boxed{-7, 7}\]
Solución 2
\[x^2 = 25\]
\[x=\boxed{-5, 5}\]
Solución 3
\[x^2 = 64\]
\[x=\boxed{-8, 8}\]
Solución 4
\[x^2 = \frac{1}{9}\]
\[x=\boxed{\frac{-1}{3}, \frac{1}{3}}\]
Solución 5
\[x^2 = \frac{64}{9}\]
\[x=\boxed{\frac{-8}{3}, \frac{8}{3}}\]
Solución 6
\[x^2 = \frac{25}{64}\]
\[x=\boxed{\frac{-5}{8}, \frac{5}{8}}\]
Solución 7
\[x^2 + 1 = \frac{13}{4}\]
\[x=\boxed{\frac{-3}{2}, \frac{3}{2}}\]
Solución 8
\[x^2 + 1 = \frac{41}{16}\]
\[x=\boxed{\frac{-5}{4}, \frac{5}{4}}\]
Solución 9
\[x^2 + 1 = \frac{73}{9}\]
\[x=\boxed{\frac{-8}{3}, \frac{8}{3}}\]
Solución 10
\[3(x^2 + 1) = \frac{34}{3}\]
\[x=\boxed{\frac{-5}{3}, \frac{5}{3}}\]
Solución 11
\[4(x^2 + 1) = 68\]
\[x=\boxed{-4, 4}\]
Solución 12
\[5(x^2 + 1) = 25\]
\[x=\boxed{-2, 2}\]
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