36х²-204х+289-30х+85+6=0
36х²-234х+380=0║:2
18х²-117х+190=0
Д=(-117)²-4*18*190 = 13689 - 13680 = 9
√Д=3
х1=(117-3)/2*18 = 114/36
х2 = 117+3/36 = 120/36
6x-17=t
t^2-5t+6=0
D=25-24=1
t12=(5+-1)/2 = 2 3
1/ 6x-17=2
6x=19
x=19/6
2/ 6x-17=3
6x=20
x=20/6=10/3
36х²-204х+289-30х+85+6=0
36х²-234х+380=0║:2
18х²-117х+190=0
Д=(-117)²-4*18*190 = 13689 - 13680 = 9
√Д=3
х1=(117-3)/2*18 = 114/36
х2 = 117+3/36 = 120/36