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Dw

a³+bx²+cy+d=0

1.α+β+γ=-b/a
2.αβ+βγ+αγ=c/a
3.αβγ=-d/a
→x³-(α+β+γ)x²+(αβ+βγ+αγ)x-αβγ=0

芽瑠

Thank you very much!!

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