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人気のある代数 >

-5x^2+43x-56=0

解

- 5 x^{2} + 43 x - 56 = 0

解

x = \frac{8}{5}, x = 7

+1

十進法表記

x = 1.6, x = 7

解答ステップ

- 5 x^{2} + 43 x - 56 = 0

解くとthe二次式

x_{1, 2} = \frac{- 43 \pm 4 3 ^{2} - 4 ( - 5 ) ( - 56 )}{2 ( - 5 )}

4 3^{2} - 4 (- 5) (- 56) = 27

x_{1, 2} = \frac{- 43 \pm 27}{2 ( - 5 )}

解を分離する

x_{1} = \frac{- 43 + 27}{2 ( - 5 )}, x_{2} = \frac{- 43 - 27}{2 ( - 5 )}

x = \frac{- 43 + 27}{2 ( - 5 )} : \frac{8}{5}

x = \frac{- 43 - 27}{2 ( - 5 )} : 7

二次equationの解:

x = \frac{8}{5}, x = 7

グラフ

人気の例

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x^{2} - 15 x - 34 = 0

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