!!!!СРОЧНО!!!! √x-1=2-2x
√(x-1) = 2 - 2x ОДЗ: x - 1 ≥ 0 2 - 2x ≥ 0 x ≥ 1 2x ≤ 2 x ≥ 1 x ≤ 1 x - 1 = (2 - 2x)² x - 1 = 4 - 8x + 4x² 4x² - 9x + 5 = 0 D = 81 - 5*4*4 = 1 √D = 1 x₁ = (9 - 1)/8 = 1 x₂ = (9 + 1)/8 = 1.25 ∉ ОДЗ Ответ: 1