-5x^2-10x=0

解

- 5 x^{2} - 10 x = 0

x = - 2, x = 0

解答ステップ

- 5 x^{2} - 10 x = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 10 ) \pm ( - 10 ) ^{2} - 4 ( - 5 ) \cdot 0}{2 ( - 5 )}

(- 10)^{2} - 4 (- 5) \cdot 0 = 10

x_{1, 2} = \frac{- ( - 10 ) \pm 10}{2 ( - 5 )}

解を分離する

x_{1} = \frac{- ( - 10 ) + 10}{2 ( - 5 )}, x_{2} = \frac{- ( - 10 ) - 10}{2 ( - 5 )}

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

x = \frac{- ( - 10 ) - 10}{2 ( - 5 )} : 0

二次equationの解:

x = - 2, x = 0