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人気のある代数 >

-4x^2-2x+210=0

解

- 4 x^{2} - 2 x + 210 = 0

解

x = - \frac{15}{2}, x = 7

+1

十進法表記

x = - 7.5, x = 7

解答ステップ

- 4 x^{2} - 2 x + 210 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 ( - 4 ) \cdot 210}{2 ( - 4 )}

(- 2)^{2} - 4 (- 4) \cdot 210 = 58

x_{1, 2} = \frac{- ( - 2 ) \pm 58}{2 ( - 4 )}

解を分離する

x_{1} = \frac{- ( - 2 ) + 58}{2 ( - 4 )}, x_{2} = \frac{- ( - 2 ) - 58}{2 ( - 4 )}

x = \frac{- ( - 2 ) + 58}{2 ( - 4 )} : - \frac{15}{2}

x = \frac{- ( - 2 ) - 58}{2 ( - 4 )} : 7

二次equationの解:

x = - \frac{15}{2}, x = 7

グラフ

人気の例

9 x^{2} - 13 x + 4 = 0

3 x^{2} = 10 x - 8

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

solvefor x,3x^2-9y^2-36z^2=36

so l v e f or x, 3 x^{2} - 9 y^{2} - 36 z^{2} = 36

5 x^{2} - 12 x - 18 = 0