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人気のある代数 >

2x-4-x^2+4=0

解

2 x - 4 - x^{2} + 4 = 0

解

x = 0, x = 2

解答ステップ

2 x - 4 - x^{2} + 4 = 0

改良

- x^{2} + 2 x = 0

解くとthe二次式

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

2^{2} - 4 (- 1) \cdot 0 = 2

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

解を分離する

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

x = \frac{- 2 + 2}{2 ( - 1 )} : 0

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

二次equationの解:

x = 0, x = 2

グラフ

人気の例

solvefor a,a^2+b^2+c^2=a+c-1/2

so l v e f or a, a^{2} + b^{2} + c^{2} = a + c - \frac{1}{2}

2 x^{2} - 7 = 7 (x - 1)

600x^2-61x+1.5=0

600 x^{2} - 61 x + 1.5 = 0

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so l v e f or x, t (x) = - 5 x (x + 2) - 3

m^{2} - 14 m - 1 = 0