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人気のある代数 >

-2x^2+9x-2=0

解

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

解

x = \frac{9 - 65}{4}, x = \frac{9 + 65}{4}

+1

十進法表記

x = 0.23443 \dots, x = 4.26556 \dots

解答ステップ

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

解くとthe二次式

x_{1, 2} = \frac{- 9 \pm 9 ^{2} - 4 ( - 2 ) ( - 2 )}{2 ( - 2 )}

9^{2} - 4 (- 2) (- 2) = 65

x_{1, 2} = \frac{- 9 \pm 65}{2 ( - 2 )}

解を分離する

x_{1} = \frac{- 9 + 65}{2 ( - 2 )}, x_{2} = \frac{- 9 - 65}{2 ( - 2 )}

x = \frac{- 9 + 65}{2 ( - 2 )} : \frac{9 - 65}{4}

x = \frac{- 9 - 65}{2 ( - 2 )} : \frac{9 + 65}{4}

二次equationの解:

x = \frac{9 - 65}{4}, x = \frac{9 + 65}{4}

グラフ

人気の例

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

x^{2} - 8 x + 8 = - 4 - 4

b^{2} x^{2} - b x = 30

9 + c^{2} = 25

x^2-4(x+3)^2-12=0

x^{2} - 4 (x + 3)^{2} - 12 = 0