1) x² - 16 < 0<br>х₁ = - 4 или х₂ = 4
-4 4
--------°\\\\\\\\\\\\\\\\\°-----> x
x∈ (-4; 4)
2) x² - 95 ≤ 0
х₁ = - √95 или х₂ = √95
-√95 √95
--------*\\\\\\\\\\\\\\\\\\\\\\\\*-----> x
x∈ [-√95 ; √95]
3) x² + 1 > 0
x² > -1 - НЕТ решения
4) x² - 3 ≥ 0
х₁ = - √3 или х₂ = √3
-√3 √3
\\\\\\\\\\\\*---------------------*\\\\\\\\\\> x
x∈ (-∞; -√3] U [√3; +∞)