|x²-2|x|-2|≥1||x|²-2|x|-2|≥1 |(|x|-1)²-3|≥1 (|x|-1)²-3≥1或 (|x|-1)²-3≤-1(|x|-1)²≥4或 (|x|-1)²≤2|x|-1≥2或|x|-1≤-2或|x|-1≤√2或|x|-1≤-√2|x|≥3或|x|≤√2+1x...