1)
2) √16641 = 129
3) x² = - 40
- 40 < 0 - решений нет
4) x² = 361
x² = 19²
x₁ = 19 x₂ = - 19
5) (x² + 5)² = 144
(x² + 5)² = 12²
x² + 5 = 12 или x² + 5 = - 12
x² = 7 x² = - 17 - решений нет
x₁ =√7
x₂ = - √7
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Verified answer
1)
2) √16641 = 129
3) x² = - 40
- 40 < 0 - решений нет
4) x² = 361
x² = 19²
x₁ = 19 x₂ = - 19
5) (x² + 5)² = 144
(x² + 5)² = 12²
x² + 5 = 12 или x² + 5 = - 12
x² = 7 x² = - 17 - решений нет
x₁ =√7
x₂ = - √7
x²=361;x=±19
(x²+5)²=144
1)x²+5=12
x²=7;x=±√7
2)x²+5=-12;x€∅