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人気のある代数 >

-5x^2-40x=-320

解

- 5 x^{2} - 40 x = - 320

解

x = - 4 (1 + 5), x = 4 (5 - 1)

+1

十進法表記

x = - 12.94427 \dots, x = 4.94427 \dots

解答ステップ

- 5 x^{2} - 40 x = - 320

320

を左側に移動します

- 5 x^{2} - 40 x + 320 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 40 ) \pm ( - 40 ) ^{2} - 4 ( - 5 ) \cdot 320}{2 ( - 5 )}

(- 40)^{2} - 4 (- 5) \cdot 320 = 405

x_{1, 2} = \frac{- ( - 40 ) \pm 40 5}{2 ( - 5 )}

解を分離する

x_{1} = \frac{- ( - 40 ) + 40 5}{2 ( - 5 )}, x_{2} = \frac{- ( - 40 ) - 40 5}{2 ( - 5 )}

x = \frac{- ( - 40 ) + 40 5}{2 ( - 5 )} : - 4 (1 + 5)

x = \frac{- ( - 40 ) - 40 5}{2 ( - 5 )} : 4 (5 - 1)

二次equationの解:

x = - 4 (1 + 5), x = 4 (5 - 1)

グラフ

人気の例

y^{2} - 5 y - 5 = - 2 y

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