\[\boxed{\text{418\ (418).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\(1)\) \((x - 8)(x + 4) > 0\)
\[x^{2} - 8x + 4x - 32 > 0\]
\[x^{2} - 4x - 32 > 0.\]
\[2)\ (x - 9)(x + 2) \leq 0\]
\[x^{2} - 9x + 2x - 18 \leq 0\]
\[x^{2} - 7x - 18 \leq 0.\]
\[3)\ (x - 7)^{2} \leq 0\]