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人気のある代数 >

-2x^2+12x-9=0

解

- 2 x^{2} + 12 x - 9 = 0

解

x = \frac{3 ( 2 - 2 )}{2}, x = \frac{3 ( 2 + 2 )}{2}

+1

十進法表記

x = 0.87867 \dots, x = 5.12132 \dots

解答ステップ

- 2 x^{2} + 12 x - 9 = 0

解くとthe二次式

x_{1, 2} = \frac{- 12 \pm 1 2 ^{2} - 4 ( - 2 ) ( - 9 )}{2 ( - 2 )}

1 2^{2} - 4 (- 2) (- 9) = 62

x_{1, 2} = \frac{- 12 \pm 6 2}{2 ( - 2 )}

解を分離する

x_{1} = \frac{- 12 + 6 2}{2 ( - 2 )}, x_{2} = \frac{- 12 - 6 2}{2 ( - 2 )}

x = \frac{- 12 + 6 2}{2 ( - 2 )} : \frac{3 ( 2 - 2 )}{2}

x = \frac{- 12 - 6 2}{2 ( - 2 )} : \frac{3 ( 2 + 2 )}{2}

二次equationの解:

x = \frac{3 ( 2 - 2 )}{2}, x = \frac{3 ( 2 + 2 )}{2}

グラフ

人気の例

x^{2} + x^{2} = 1 8^{2}

x (x + 1) = 132

2 v^{2} + 12 = 14 v

(x^{2} - 8) = 0

\frac{1}{2} - y^{2} + 3 = 0