2) x² - 36 ≤ 0
(x - 6)(x + 6) ≤ 0
+ - +
________[-6]_________[6]________
//////////////////////
Ответ : x ∈ [- 6 ; 6]
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2) x² - 36 ≤ 0
(x - 6)(x + 6) ≤ 0
+ - +
________[-6]_________[6]________
//////////////////////
Ответ : x ∈ [- 6 ; 6]