Solución 1
\[( x - 9 ) ( x - 5 ) = 0\]
\[x=\boxed{9, 5}\]
Solución 2
\[( x + 9 ) ( x + 1 ) = 0\]
\[x=\boxed{-9, -1}\]
Solución 3
\[( x + 7 ) ( x - 5 ) = 0\]
\[x=\boxed{-7, 5}\]
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