Сделаем замену :
(x - 1)² = m, m ≥ 0
(x - 1)⁴ - 15(x - 1)² - 16 > 0
m² - 15m - 16 > 0
(m + 1)(m - 16) > 0
+ - +
______₀______₀________ m
- 1 16
//////////// ////////////////
1) m < - 1 - решений нет, так как m ≥ 0
2) m > 16
(x - 1)² > 16
(x - 1)² - 16 > 0
(x - 1)² - 4² > 0
(x - 1 - 4)(x - 1 + 4) > 0
(x - 5)(x + 3) > 0
______₀______₀_____
- 3 5
///////////// //////////
Ответ : x ∈ ( - ∞ ; - 3) ∪ (5 ; + ∞)
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Verified answer
Сделаем замену :
(x - 1)² = m, m ≥ 0
(x - 1)⁴ - 15(x - 1)² - 16 > 0
m² - 15m - 16 > 0
(m + 1)(m - 16) > 0
+ - +
______₀______₀________ m
- 1 16
//////////// ////////////////
1) m < - 1 - решений нет, так как m ≥ 0
2) m > 16
(x - 1)² > 16
(x - 1)² - 16 > 0
(x - 1)² - 4² > 0
(x - 1 - 4)(x - 1 + 4) > 0
(x - 5)(x + 3) > 0
+ - +
______₀______₀_____
- 3 5
///////////// //////////
Ответ : x ∈ ( - ∞ ; - 3) ∪ (5 ; + ∞)