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
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