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人気のある代数 >

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

解

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

解

x = - 1, x = - \frac{1}{4}

+1

十進法表記

x = - 1, x = - 0.25

解答ステップ

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

解くとthe二次式

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

(- 5)^{2} - 4 (- 4) (- 1) = 3

x_{1, 2} = \frac{- ( - 5 ) \pm 3}{2 ( - 4 )}

解を分離する

x_{1} = \frac{- ( - 5 ) + 3}{2 ( - 4 )}, x_{2} = \frac{- ( - 5 ) - 3}{2 ( - 4 )}

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

x = \frac{- ( - 5 ) - 3}{2 ( - 4 )} : - \frac{1}{4}

二次equationの解:

x = - 1, x = - \frac{1}{4}

グラフ

人気の例

2 x + 3 x^{2} = 6 x - 5

3 x^{2} - 9 x + 16 = 178

- 5 x^{2} + 10 x = 0

2x^2+31=4x^2-19

2 x^{2} + 31 = 4 x^{2} - 19

solvefor x,25x^2+y^2-100x+6y+190=0

so l v e f or x, 25 x^{2} + y^{2} - 100 x + 6 y + 190 = 0