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人気のある代数 >

-x^2+5x+1=0

解

- x^{2} + 5 x + 1 = 0

解

x = - \frac{- 5 + 29}{2}, x = \frac{5 + 29}{2}

+1

十進法表記

x = - 0.19258 \dots, x = 5.19258 \dots

解答ステップ

- x^{2} + 5 x + 1 = 0

解くとthe二次式

x_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 ( - 1 ) \cdot 1}{2 ( - 1 )}

5^{2} - 4 (- 1) \cdot 1 = 29

x_{1, 2} = \frac{- 5 \pm 29}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- 5 + 29}{2 ( - 1 )}, x_{2} = \frac{- 5 - 29}{2 ( - 1 )}

x = \frac{- 5 + 29}{2 ( - 1 )} : - \frac{- 5 + 29}{2}

x = \frac{- 5 - 29}{2 ( - 1 )} : \frac{5 + 29}{2}

二次equationの解:

x = - \frac{- 5 + 29}{2}, x = \frac{5 + 29}{2}

グラフ

人気の例

8/5 x+24/5 =x^2+13/5 x-6/5

\frac{8}{5} x + \frac{24}{5} = x^{2} + \frac{13}{5} x - \frac{6}{5}

2 x^{2} + 6 x - 12 = 0

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- x^{2} + 5 x + 18 = 0

- 2 (x - 3)^{2} + 8 = 10