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人気のある代数 >

-5x^2-4x-1=0

解

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

解

x = - \frac{2}{5} - i \frac{1}{5}, x = - \frac{2}{5} + i \frac{1}{5}

解答ステップ

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

解くとthe二次式

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

簡素化

(- 4)^{2} - 4 (- 5) (- 1) : 2 i

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

解を分離する

x_{1} = \frac{- ( - 4 ) + 2 i}{2 ( - 5 )}, x_{2} = \frac{- ( - 4 ) - 2 i}{2 ( - 5 )}

x = \frac{- ( - 4 ) + 2 i}{2 ( - 5 )} : - \frac{2}{5} - i \frac{1}{5}

x = \frac{- ( - 4 ) - 2 i}{2 ( - 5 )} : - \frac{2}{5} + i \frac{1}{5}

二次equationの解:

x = - \frac{2}{5} - i \frac{1}{5}, x = - \frac{2}{5} + i \frac{1}{5}

グラフ

人気の例

因数 4x^2+3x-22=0

f a c t or 4 x^{2} + 3 x - 22 = 0

-14x+168-7x^2=0

- 14 x + 168 - 7 x^{2} = 0

x^2-25=(a+b)(a-c)

x^{2} - 25 = (a + b) (a - c)

- 2 x^{2} + 12 x - 20 = 0

2 x^{2} - 15 = 65