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人気のある代数 >

-30-13x-15x^2=0

解

- 30 - 13 x - 15 x^{2} = 0

解

x = - \frac{13}{30} - i \frac{1631}{30}, x = - \frac{13}{30} + i \frac{1631}{30}

解答ステップ

- 30 - 13 x - 15 x^{2} = 0

標準的な形式で書く

a x^{2} + b x + c = 0

- 15 x^{2} - 13 x - 30 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 13 ) \pm ( - 13 ) ^{2} - 4 ( - 15 ) ( - 30 )}{2 ( - 15 )}

簡素化

(- 13)^{2} - 4 (- 15) (- 30) : 1631 i

x_{1, 2} = \frac{- ( - 13 ) \pm 1631 i}{2 ( - 15 )}

解を分離する

x_{1} = \frac{- ( - 13 ) + 1631 i}{2 ( - 15 )}, x_{2} = \frac{- ( - 13 ) - 1631 i}{2 ( - 15 )}

x = \frac{- ( - 13 ) + 1631 i}{2 ( - 15 )} : - \frac{13}{30} - i \frac{1631}{30}

x = \frac{- ( - 13 ) - 1631 i}{2 ( - 15 )} : - \frac{13}{30} + i \frac{1631}{30}

二次equationの解:

x = - \frac{13}{30} - i \frac{1631}{30}, x = - \frac{13}{30} + i \frac{1631}{30}

グラフ

人気の例

y^{2} - 12 y = 28

x^{2} - 841 = 0

6 x^{2} - 53 x = 9

\frac{b - 2 x ^{2}}{a} = 5

quadraticformula x^2=8x-15

q u a d r a t i c f or m u l a x^{2} = 8 x - 15