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人気のある代数 >

-4.9x^2+30x+200=0

解

- 4.9 x^{2} + 30 x + 200 = 0

解

x = - \frac{10 ( 1205 - 15 )}{49}, x = \frac{10 ( 15 + 1205 )}{49}

+1

十進法表記

x = - 4.02308 \dots, x = 10.14553 \dots

解答ステップ

- 4.9 x^{2} + 30 x + 200 = 0

以下で両辺を乗じる:

10

- 49 x^{2} + 300 x + 2000 = 0

解くとthe二次式

x_{1, 2} = \frac{- 300 \pm 30 0 ^{2} - 4 ( - 49 ) \cdot 2000}{2 ( - 49 )}

30 0^{2} - 4 (- 49) \cdot 2000 = 201205

x_{1, 2} = \frac{- 300 \pm 20 1205}{2 ( - 49 )}

解を分離する

x_{1} = \frac{- 300 + 20 1205}{2 ( - 49 )}, x_{2} = \frac{- 300 - 20 1205}{2 ( - 49 )}

x = \frac{- 300 + 20 1205}{2 ( - 49 )} : - \frac{10 ( 1205 - 15 )}{49}

x = \frac{- 300 - 20 1205}{2 ( - 49 )} : \frac{10 ( 15 + 1205 )}{49}

二次equationの解:

x = - \frac{10 ( 1205 - 15 )}{49}, x = \frac{10 ( 15 + 1205 )}{49}

グラフ

人気の例

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