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人気のある代数 >

-10x^2+x+21=0

解

- 10 x^{2} + x + 21 = 0

解

x = - \frac{7}{5}, x = \frac{3}{2}

+1

十進法表記

x = - 1.4, x = 1.5

解答ステップ

- 10 x^{2} + x + 21 = 0

解くとthe二次式

x_{1, 2} = \frac{- 1 \pm 1 ^{2} - 4 ( - 10 ) \cdot 21}{2 ( - 10 )}

1^{2} - 4 (- 10) \cdot 21 = 29

x_{1, 2} = \frac{- 1 \pm 29}{2 ( - 10 )}

解を分離する

x_{1} = \frac{- 1 + 29}{2 ( - 10 )}, x_{2} = \frac{- 1 - 29}{2 ( - 10 )}

x = \frac{- 1 + 29}{2 ( - 10 )} : - \frac{7}{5}

x = \frac{- 1 - 29}{2 ( - 10 )} : \frac{3}{2}

二次equationの解:

x = - \frac{7}{5}, x = \frac{3}{2}

グラフ

人気の例

x^2-200x+4000=0

x^{2} - 200 x + 4000 = 0

(x+1)^2+(x+2)^2=x^2+6

(x + 1)^{2} + (x + 2)^{2} = x^{2} + 6

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(m-2)x^2+(2m+1)x=m^2+5m+1

(m - 2) x^{2} + (2 m + 1) x = m^{2} + 5 m + 1

x^{2} + 9 x - 136 = 0