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人気のある代数 >

2x^2-4x-14=0

解

2 x^{2} - 4 x - 14 = 0

解

x = 1 + 22, x = 1 - 22

+1

十進法表記

x = 3.82842 \dots, x = - 1.82842 \dots

解答ステップ

2 x^{2} - 4 x - 14 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 4 ) \pm ( - 4 ) ^{2} - 4 \cdot 2 ( - 14 )}{2 \cdot 2}

(- 4)^{2} - 4 \cdot 2 (- 14) = 82

x_{1, 2} = \frac{- ( - 4 ) \pm 8 2}{2 \cdot 2}

解を分離する

x_{1} = \frac{- ( - 4 ) + 8 2}{2 \cdot 2}, x_{2} = \frac{- ( - 4 ) - 8 2}{2 \cdot 2}

x = \frac{- ( - 4 ) + 8 2}{2 \cdot 2} : 1 + 22

x = \frac{- ( - 4 ) - 8 2}{2 \cdot 2} : 1 - 22

二次equationの解:

x = 1 + 22, x = 1 - 22

グラフ

人気の例

2x^2-(a+b+2sqrt(ab))x+(a+b)sqrt(ab)=0

2 x^{2} - (a + b + 2 ab) x + (a + b) ab = 0

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