05Jan

7x^2-x-8=0 уравнение

ChelovekDasha Алгебра 2 10

7x^2-x-8=0 уравнение

Posted by ChelovekDasha | Posted at Jan 05, 2014 | Categories: Алгебра

Answers

Puet49
Puet49

7x²-x-8=0 D=1+224=225 x1=(1-15)/14=-1 x2=(1+15)/14=8/7

Jan 05, 2014 07:07
stepka24
stepka24

7x²-x-8=0 D=(-1)²-4*(-8)*7=224+1=225 x₁=(1-15)/2*7=-1 x₂=(1+15)/2*7=1 1/7

Jan 05, 2014 07:09

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