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人気のある代数 >

-x^2+6x+9=0

解

- x^{2} + 6 x + 9 = 0

解

x = - 3 (2 - 1), x = 3 (1 + 2)

+1

十進法表記

x = - 1.24264 \dots, x = 7.24264 \dots

解答ステップ

- x^{2} + 6 x + 9 = 0

解くとthe二次式

x_{1, 2} = \frac{- 6 \pm 6 ^{2} - 4 ( - 1 ) \cdot 9}{2 ( - 1 )}

6^{2} - 4 (- 1) \cdot 9 = 62

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

解を分離する

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

x = \frac{- 6 + 6 2}{2 ( - 1 )} : - 3 (2 - 1)

x = \frac{- 6 - 6 2}{2 ( - 1 )} : 3 (1 + 2)

二次equationの解:

x = - 3 (2 - 1), x = 3 (1 + 2)

グラフ

人気の例

s^{2} + 12 s + 25 = 0

3 + 2 x^{2} - 3 x = 7 + 6 x

x^{2} + 16 x + 5 = 9

3 x^{2} = 2 + x

8 m = m^{2} + 15