x²+ax-51=0 x₁=3 a=?
x₁*x₂=-51
3*x₂=-51 |÷3
x₂=-17
a=-(x₁+x₂)=-(3+(-17))=-(3-17)=-(-14)=14.
Ответ: a=14.
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x²+ax-51=0 x₁=3 a=?
x₁*x₂=-51
3*x₂=-51 |÷3
x₂=-17
a=-(x₁+x₂)=-(3+(-17))=-(3-17)=-(-14)=14.
Ответ: a=14.