[m]\left\{\begin {matrix}x+4 ≥ 0\\5-x ≥ 0\end {matrix}\right.[/m][m]\left\{\begin {matrix}x ≥ -4\\x ≤ 5\end {matrix}\right.[/m]
[b][-4;5][/b]
2)
[b][-7;5][/b]
3)
[m]\left\{\begin {matrix}x^2-9 ≥ 0\\x-2 ≥ 0\end {matrix}\right.[/m][m]\left\{\begin {matrix}x ≤-3 ... или ...x ≥ 3\\x ≥ 2\end {matrix}\right.[/m]
[b][3;+ ∞ )[/b]
4)
[b][-4;4][/b]