(x + 1)² = t t² + t - 6 = 0 D = 1 + 24 = 25 t = (- 1 - 5)/2 = - 3 t = (- 1 + 5)/2 = 2 (x + 1)² = - 3 (x + 1)² = 2 нет корней x + 1 = √2 x + 1 = - √2 x = √2 - 1 x = -√2 - 1