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人気のある代数 >

-2x^2+4x-1=0

解

- 2 x^{2} + 4 x - 1 = 0

解

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

+1

十進法表記

x = 0.29289 \dots, x = 1.70710 \dots

解答ステップ

- 2 x^{2} + 4 x - 1 = 0

解くとthe二次式

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

4^{2} - 4 (- 2) (- 1) = 22

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

解を分離する

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

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

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

二次equationの解:

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

グラフ

人気の例

6 x - 2 (x + 9) = 2

簡約 (5^3x^2y^4)^0

s im pl i f y (5^{3} x^{2} y^{4})^{0}

4 x + 5 x = 5 x + 7

3 x^{2} + 7 = 6 x

2/3+1/5 x-1/4 = 4/5 x

\frac{2}{3} + \frac{1}{5} x - \frac{1}{4} = \frac{4}{5} x