Ответ:
2х^2+6х-3х-9-2х+х^2=0
3х^2+х-9=0
а=3,b=1,c=9
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Ответ:
2х^2+6х-3х-9-2х+х^2=0
3х^2+х-9=0
а=3,b=1,c=9