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人気のある代数 >

-2x^2-x+4=0

解

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

解

x = - \frac{1 + 33}{4}, x = \frac{33 - 1}{4}

+1

十進法表記

x = - 1.68614 \dots, x = 1.18614 \dots

解答ステップ

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

解くとthe二次式

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

(- 1)^{2} - 4 (- 2) \cdot 4 = 33

x_{1, 2} = \frac{- ( - 1 ) \pm 33}{2 ( - 2 )}

解を分離する

x_{1} = \frac{- ( - 1 ) + 33}{2 ( - 2 )}, x_{2} = \frac{- ( - 1 ) - 33}{2 ( - 2 )}

x = \frac{- ( - 1 ) + 33}{2 ( - 2 )} : - \frac{1 + 33}{4}

x = \frac{- ( - 1 ) - 33}{2 ( - 2 )} : \frac{33 - 1}{4}

二次equationの解:

x = - \frac{1 + 33}{4}, x = \frac{33 - 1}{4}

グラフ

人気の例

(2+3x)^2=(1-x)(1+x)

(2 + 3 x)^{2} = (1 - x) (1 + x)

2 x^{2} - 5 = - 9 x

solvefor x,x^2+xy+y^2-4=0

so l v e f or x, x^{2} + x y + y^{2} - 4 = 0

2 y^{2} + 7 y - 4 = 0

x^{2} - 4 b = 0