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人気のある代数 >

2x^2-7x+1=0

解

2 x^{2} - 7 x + 1 = 0

解

x = \frac{7 + 41}{4}, x = \frac{7 - 41}{4}

+1

十進法表記

x = 3.35078 \dots, x = 0.14921 \dots

解答ステップ

2 x^{2} - 7 x + 1 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 2 \cdot 1}{2 \cdot 2}

(- 7)^{2} - 4 \cdot 2 \cdot 1 = 41

x_{1, 2} = \frac{- ( - 7 ) \pm 41}{2 \cdot 2}

解を分離する

x_{1} = \frac{- ( - 7 ) + 41}{2 \cdot 2}, x_{2} = \frac{- ( - 7 ) - 41}{2 \cdot 2}

x = \frac{- ( - 7 ) + 41}{2 \cdot 2} : \frac{7 + 41}{4}

x = \frac{- ( - 7 ) - 41}{2 \cdot 2} : \frac{7 - 41}{4}

二次equationの解:

x = \frac{7 + 41}{4}, x = \frac{7 - 41}{4}

グラフ

人気の例

12 x^{2} - 24 x = 0

(\frac{1}{2}) x^{2} + x + 5 = 0

\frac{2}{6} = \frac{u}{9}

(2(x-1))/3-(x+4}{15}+1=x-\frac{3(x-2))/5

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(2a-3)/6 =(2a)/3+1/2

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