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人気のある代数 >

-2x^2-9x+10=0

解

- 2 x^{2} - 9 x + 10 = 0

解

x = - \frac{9 + 161}{4}, x = \frac{161 - 9}{4}

+1

十進法表記

x = - 5.42214 \dots, x = 0.92214 \dots

解答ステップ

- 2 x^{2} - 9 x + 10 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 9 ) \pm ( - 9 ) ^{2} - 4 ( - 2 ) \cdot 10}{2 ( - 2 )}

(- 9)^{2} - 4 (- 2) \cdot 10 = 161

x_{1, 2} = \frac{- ( - 9 ) \pm 161}{2 ( - 2 )}

解を分離する

x_{1} = \frac{- ( - 9 ) + 161}{2 ( - 2 )}, x_{2} = \frac{- ( - 9 ) - 161}{2 ( - 2 )}

x = \frac{- ( - 9 ) + 161}{2 ( - 2 )} : - \frac{9 + 161}{4}

x = \frac{- ( - 9 ) - 161}{2 ( - 2 )} : \frac{161 - 9}{4}

二次equationの解:

x = - \frac{9 + 161}{4}, x = \frac{161 - 9}{4}

グラフ

人気の例

completesquare x^2-10x+21=0

co m pl e t es q u a re x^{2} - 10 x + 21 = 0

3 (x^{2} - x) = x^{2}

5 x^{2} = 18 + x

2 x^{2} + 18 x + 28 = 0

x^2+6x+4=-2x+4-2x+4

x^{2} + 6 x + 4 = - 2 x + 4 - 2 x + 4