Ответ:
3х²+18х-2х-12=-9
3х²+16х-3=0
Д=220
х1=-16+15/2=-1/2
х2=-16-15/2=-15.5
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Ответ:
3х²+18х-2х-12=-9
3х²+16х-3=0
Д=220
х1=-16+15/2=-1/2
х2=-16-15/2=-15.5