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Ответ

Ответ дан
1709200213179

Відповідь:

Пояснення:

-3х^2+6х+18=0

D=b^2-4ac

D=6^2-4*(-3)*18 =225

КоріньD=15 x=(-b+-коріньD)/2a

X1=(-6+15)/2*(-3)=-9/6

X2=(-6-15)/2*(-3)=-21/6

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