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人気のある代数 >

-5x^2+9x-4=0

解

- 5 x^{2} + 9 x - 4 = 0

解

x = \frac{4}{5}, x = 1

+1

十進法表記

x = 0.8, x = 1

解答ステップ

- 5 x^{2} + 9 x - 4 = 0

解くとthe二次式

x_{1, 2} = \frac{- 9 \pm 9 ^{2} - 4 ( - 5 ) ( - 4 )}{2 ( - 5 )}

9^{2} - 4 (- 5) (- 4) = 1

x_{1, 2} = \frac{- 9 \pm 1}{2 ( - 5 )}

解を分離する

x_{1} = \frac{- 9 + 1}{2 ( - 5 )}, x_{2} = \frac{- 9 - 1}{2 ( - 5 )}

x = \frac{- 9 + 1}{2 ( - 5 )} : \frac{4}{5}

x = \frac{- 9 - 1}{2 ( - 5 )} : 1

二次equationの解:

x = \frac{4}{5}, x = 1

グラフ

人気の例

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

x^2-(7x)/6+1/3 =0

x^{2} - \frac{7 x}{6} + \frac{1}{3} = 0

2 x^{2} - 1 x - 1 = 2

(x + 4) (2 x - 1) = 0

completesquare x^2+10x-96=0

co m pl e t es q u a re x^{2} + 10 x - 96 = 0