\[\left( 16 - x^{2} \right)(2x + 9) = 0\]
\[1)\ 16 - x^{2} = 0\]
\[x^{2} = 16\]
\[x = \pm 4.\]
\[2)\ 2x + 9 = 0\]
\[2x = - 9\]
\[x = - 4,5.\]
\[Ответ:x = - 4,5;x = \pm 4.\]