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人気のある代数 >

-5x^2-7x+5=0

解

- 5 x^{2} - 7 x + 5 = 0

解

x = - \frac{7 + 149}{10}, x = \frac{149 - 7}{10}

+1

十進法表記

x = - 1.92065 \dots, x = 0.52065 \dots

解答ステップ

- 5 x^{2} - 7 x + 5 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 ( - 5 ) \cdot 5}{2 ( - 5 )}

(- 7)^{2} - 4 (- 5) \cdot 5 = 149

x_{1, 2} = \frac{- ( - 7 ) \pm 149}{2 ( - 5 )}

解を分離する

x_{1} = \frac{- ( - 7 ) + 149}{2 ( - 5 )}, x_{2} = \frac{- ( - 7 ) - 149}{2 ( - 5 )}

x = \frac{- ( - 7 ) + 149}{2 ( - 5 )} : - \frac{7 + 149}{10}

x = \frac{- ( - 7 ) - 149}{2 ( - 5 )} : \frac{149 - 7}{10}

二次equationの解:

x = - \frac{7 + 149}{10}, x = \frac{149 - 7}{10}

グラフ

人気の例

x^{2} + 10 x + 25 = 24

completesquare (5*x)/8+(x^2)/(51)

co m pl e t es q u a re \frac{5 \cdot x}{8} + \frac{x ^{2}}{51}

-160x^2+450x-300=0

- 160 x^{2} + 450 x - 300 = 0

g (g + 10) = - 6

1000x*x/2 =5643(104-x)

1000 x \cdot \frac{x}{2} = 5643 (104 - x)