Question

x^2=2 полное решение

Answer 1

$x = - + \sqrt{2 \\ } \\ x = - \sqrt{2} \\ x = \sqrt{ + \sqrt{2} }$

Answer 2

a² - b² = (a - b)(a + b)

x² = 2

x² - √2² = 0

(x - √2)(x + √2) = 0

x₁ = √2

x₂ = -√2