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人気のある代数 >

2x^2-15x+2=0

解

2 x^{2} - 15 x + 2 = 0

解

x = \frac{15 + 209}{4}, x = \frac{15 - 209}{4}

+1

十進法表記

x = 7.36420 \dots, x = 0.13579 \dots

解答ステップ

2 x^{2} - 15 x + 2 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 15 ) \pm ( - 15 ) ^{2} - 4 \cdot 2 \cdot 2}{2 \cdot 2}

(- 15)^{2} - 4 \cdot 2 \cdot 2 = 209

x_{1, 2} = \frac{- ( - 15 ) \pm 209}{2 \cdot 2}

解を分離する

x_{1} = \frac{- ( - 15 ) + 209}{2 \cdot 2}, x_{2} = \frac{- ( - 15 ) - 209}{2 \cdot 2}

x = \frac{- ( - 15 ) + 209}{2 \cdot 2} : \frac{15 + 209}{4}

x = \frac{- ( - 15 ) - 209}{2 \cdot 2} : \frac{15 - 209}{4}

二次equationの解:

x = \frac{15 + 209}{4}, x = \frac{15 - 209}{4}

グラフ

人気の例

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