-2x^2+4000x=0

解

- 2 x^{2} + 4000 x = 0

x = 0, x = 2000

解答ステップ

- 2 x^{2} + 4000 x = 0

解くとthe二次式

x_{1, 2} = \frac{- 4000 \pm 400 0 ^{2} - 4 ( - 2 ) \cdot 0}{2 ( - 2 )}

400 0^{2} - 4 (- 2) \cdot 0 = 4000

x_{1, 2} = \frac{- 4000 \pm 4000}{2 ( - 2 )}

解を分離する

x_{1} = \frac{- 4000 + 4000}{2 ( - 2 )}, x_{2} = \frac{- 4000 - 4000}{2 ( - 2 )}

x = \frac{- 4000 + 4000}{2 ( - 2 )} : 0

x = \frac{- 4000 - 4000}{2 ( - 2 )} : 2000

二次equationの解:

x = 0, x = 2000