1)
x²<36<br>x²-36<0<br>(x-6)(x+6)<0<br>x=6 x= -6
+ - +
-------- -6 ----------- 6 ----------
\\\\\\\\\\\\\\
x∈(-6; 6)
Ответ: (-6; 6).
2)
x²≥16
x²-16≥0
(x-4)(x+4)≥0
x=4 x= -4
+ - +
----------- -4 -------------- 4 --------------
\\\\\\\\\\\\ \\\\\\\\\\\\\\\
x∈(-∞; -4)U(4; +∞)
Ответ: (-∞; -4)U(4; +∞)