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人気のある代数 >

665-216x+12x^2=0

解

665 - 216 x + 12 x^{2} = 0

解

x = \frac{54 + 921}{6}, x = \frac{54 - 921}{6}

+1

十進法表記

x = 14.05799 \dots, x = 3.94200 \dots

解答ステップ

665 - 216 x + 12 x^{2} = 0

標準的な形式で書く

a x^{2} + b x + c = 0

12 x^{2} - 216 x + 665 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 216 ) \pm ( - 216 ) ^{2} - 4 \cdot 12 \cdot 665}{2 \cdot 12}

(- 216)^{2} - 4 \cdot 12 \cdot 665 = 4921

x_{1, 2} = \frac{- ( - 216 ) \pm 4 921}{2 \cdot 12}

解を分離する

x_{1} = \frac{- ( - 216 ) + 4 921}{2 \cdot 12}, x_{2} = \frac{- ( - 216 ) - 4 921}{2 \cdot 12}

x = \frac{- ( - 216 ) + 4 921}{2 \cdot 12} : \frac{54 + 921}{6}

x = \frac{- ( - 216 ) - 4 921}{2 \cdot 12} : \frac{54 - 921}{6}

二次equationの解:

x = \frac{54 + 921}{6}, x = \frac{54 - 921}{6}

グラフ

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