Resumen
Ejercicio 1
\[x^2 = 36\]
\[x=\boxed{\phantom{\rule{2em}{1.2em}}}\]
\[x=\boxed{\phantom{\rule{2em}{1.2em}}}\]
Ejercicio 2
\[x^2 = \frac{81}{4}\]
\[x=\boxed{\phantom{\rule{2em}{1.2em}}}\]
\[x=\boxed{\phantom{\rule{2em}{1.2em}}}\]
Ejercicio 3
\[( x + 7 ) ( x - 5 ) = 0\]
\[x=\boxed{\phantom{\rule{2em}{1.2em}}}\]
\[x=\boxed{\phantom{\rule{2em}{1.2em}}}\]
Ejercicio 4
\[x^2 - x - 12=0\]
\[x = \boxed{\phantom{\rule{2em}{1.2em}}}\]
\[x = \boxed{\phantom{\rule{2em}{1.2em}}}\]
Ejercicio 5
\[-x^2 - 5x + 14=0\]
\[x = \boxed{\phantom{\rule{2em}{1.2em}}}\]
\[x = \boxed{\phantom{\rule{2em}{1.2em}}}\]
Ejercicio 6
\[-3x^2 - 3x + 90=0\]
\[x = \boxed{\phantom{\rule{2em}{1.2em}}}\]
\[x = \boxed{\phantom{\rule{2em}{1.2em}}}\]