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人気のある代数 >

-4x^2+151.8x-396.8=0

解

- 4 x^{2} + 151.8 x - 396.8 = 0

解

x = \frac{759 - 417361}{40}, x = \frac{759 + 417361}{40}

+1

十進法表記

x = 2.82412 \dots, x = 35.12587 \dots

解答ステップ

- 4 x^{2} + 151.8 x - 396.8 = 0

以下で両辺を乗じる:

10

- 40 x^{2} + 1518 x - 3968 = 0

解くとthe二次式

x_{1, 2} = \frac{- 1518 \pm 151 8 ^{2} - 4 ( - 40 ) ( - 3968 )}{2 ( - 40 )}

151 8^{2} - 4 (- 40) (- 3968) = 2417361

x_{1, 2} = \frac{- 1518 \pm 2 417361}{2 ( - 40 )}

解を分離する

x_{1} = \frac{- 1518 + 2 417361}{2 ( - 40 )}, x_{2} = \frac{- 1518 - 2 417361}{2 ( - 40 )}

x = \frac{- 1518 + 2 417361}{2 ( - 40 )} : \frac{759 - 417361}{40}

x = \frac{- 1518 - 2 417361}{2 ( - 40 )} : \frac{759 + 417361}{40}

二次equationの解:

x = \frac{759 - 417361}{40}, x = \frac{759 + 417361}{40}

グラフ

人気の例

(2 x + 3)^{2} = 169

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