РЕШЕНИЕ:
1/(x−1)2 + 4/(x−1) − 12 = 0
1 + 4(х - 1) - 12(х-1)2 = 0
1 + 4х - 4 - 12 (х2 - 2х + 1) = 0
4х - 3 - 12х2 + 24х - 12 = 0
- 12х2 + 28х - 15 = 0
12х2 - 28х + 15 = 0
D = (-28)2 - 4∙12∙15 = 784 - 720 = 64 = 82
x1 = (28 - 8) / 24 = 20 / 24 = 5/6
x2 = (28 + 8) / 24 = 36 / 24 = 3/2
Ответ: 5/6 ; 3/2