(t^-9t)^+22(t^-9t)+112=0 используя метод введения новой переменной

T^2 - 9t = z

z^2 + 22z + 112 = 0 
D = 36
z1 = ( - 22 + 6)/2 = - 16/2 = - 8
z2 = ( - 22 - 6)/2 = - 28/2 = - 14

1) t^2 - 9t = - 8
2) t^2 - 9t = - 14

(1) t^2 - 9t + 8 = 0 
D = 49 = 7^2
t1 = ( 9 + 7)/2 = 8
t2 = 1

(2) t^2 - 9t + 14 = 0 
D = 25
t3 = ( 9 + 5)/2 = 7
t4 = 2

ответ
1; 2; 7; 8