Question

(х-1)(х+1)(х2+1)=6х2-1 найдите корень уравнения

Answer 1

$(x - 1)(x + 1)( {x}^{2} + 1) = 6 {x}^{2} - 1 \\ ( {x}^{2} - 1)( {x}^{2} + 1) = 6 {x}^{2} - 1 \\ {x}^{4} - 1 - 6 {x}^{2} + 1 = 0 \\ {x}^{4} - 6 {x}^{2} = 0 \\ {x}^{2} ( {x}^{2} - 6) = 0 \\ {x}^{2} = 0 \\ x = 0 \\ {x}^{2} = 6 \\ x = \sqrt{6} \\ x = - \sqrt{6}$

ответ: 0;

$\sqrt{6}$

$- \sqrt{6}$

Answer 2

Объяснение:

(х - 1)(х + 1)(х² + 1) = 6х² - 1,

(х² - 1)(х² + 1) = 6х² - 1,

х⁴ - 1 = 6х² - 1,

х⁴ = 6х²,

х⁴ - 6х² = 0,

х² * (х² - 6) = 0,

х² = 0,     х² - 6 = 0,

х₁ = 0,    х² = 6,

              х = ±√6,

              х₂ = √6,     х₃ = -√6