X (x - 5)(x - 1) = 12(x - 5)
(x - 5) (x(x - 1) - 12) = 0
(x - 5)(x^2 - x - 12) = 0
1) x - 5 = 0
x = 5
2) x^2 - x - 12 = 0
D = 1 + 4*12 = 49
x1 = (1 + 7)/2 = 8/2 = 4
x2 = (1 - 7)/2 = - 6/2 = - 3
Ответ
- 3; 4 ; 5
Решение во вложении.........
2x^2-x-4x+2:2x^2+7x+3>0
2-5x:7x+3>0