A1dar X⁴ = (x - 12)²

[ x² = x - 12
[ x² = 12 - x

[ x² - x + 12 = 0
[ x² + x - 12 = 0

1) D = 1 - 48 < 0 ⇒ x ∈ ∅

2) D = 1 + 48 = 49
x₁ = (-1 + 7) / 2 = 3
x₂ = (-1 - 7) / 2 = -4

Ответ: 3; -4