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人気のある代数 >

-5=x(-0.01x-0.4)

解

- 5 = x (- 0.01 x - 0.4)

解

x = - \frac{0.4 + 0.36}{0.02}, x = \frac{0.36 - 0.4}{0.02}

+1

十進法表記

x = - 50, x = 10

解答ステップ

- 5 = x (- 0.01 x - 0.4)

拡張

x (- 0.01 x - 0.4) : - 0.01 x^{2} - 0.4 x

- 5 = - 0.01 x^{2} - 0.4 x

辺を交換する

- 0.01 x^{2} - 0.4 x = - 5

5

を左側に移動します

- 0.01 x^{2} - 0.4 x + 5 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 0.4 ) \pm ( - 0.4 ) ^{2} - 4 ( - 0.01 ) \cdot 5}{2 ( - 0.01 )}

(- 0.4)^{2} - 4 (- 0.01) \cdot 5 = 0.36

x_{1, 2} = \frac{- ( - 0.4 ) \pm 0.36}{2 ( - 0.01 )}

解を分離する

x_{1} = \frac{- ( - 0.4 ) + 0.36}{2 ( - 0.01 )}, x_{2} = \frac{- ( - 0.4 ) - 0.36}{2 ( - 0.01 )}

x = \frac{- ( - 0.4 ) + 0.36}{2 ( - 0.01 )} : - \frac{0.4 + 0.36}{0.02}

x = \frac{- ( - 0.4 ) - 0.36}{2 ( - 0.01 )} : \frac{0.36 - 0.4}{0.02}

二次equationの解:

x = - \frac{0.4 + 0.36}{0.02}, x = \frac{0.36 - 0.4}{0.02}

グラフ

人気の例

9 p^{2} - 12 p - 2 = 0

10x^2-2(x-1)+10=9(x^2+1)

10 x^{2} - 2 (x - 1) + 10 = 9 (x^{2} + 1)

p^{2} - 50 = 0

p^{2} = 81

p^{2} = 49