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人気のある代数 >

2(x+3)-x^2-3x=0

解

2 (x + 3) - x^{2} - 3 x = 0

解

x = - 3, x = 2

解答ステップ

2 (x + 3) - x^{2} - 3 x = 0

拡張

2 (x + 3) - x^{2} - 3 x : - x^{2} - x + 6

- x^{2} - x + 6 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 ( - 1 ) \cdot 6}{2 ( - 1 )}

(- 1)^{2} - 4 (- 1) \cdot 6 = 5

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

解を分離する

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

x = \frac{- ( - 1 ) + 5}{2 ( - 1 )} : - 3

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

二次equationの解:

x = - 3, x = 2

グラフ

人気の例

12 x^{2} - 36 x = - 27

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520 = 3 (x - 3) (2.1 x - 3)

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