-2x^2+50x=0

解

- 2 x^{2} + 50 x = 0

x = 0, x = 25

解答ステップ

- 2 x^{2} + 50 x = 0

解くとthe二次式

x_{1, 2} = \frac{- 50 \pm 5 0 ^{2} - 4 ( - 2 ) \cdot 0}{2 ( - 2 )}

5 0^{2} - 4 (- 2) \cdot 0 = 50

x_{1, 2} = \frac{- 50 \pm 50}{2 ( - 2 )}

解を分離する

x_{1} = \frac{- 50 + 50}{2 ( - 2 )}, x_{2} = \frac{- 50 - 50}{2 ( - 2 )}

x = \frac{- 50 + 50}{2 ( - 2 )} : 0

x = \frac{- 50 - 50}{2 ( - 2 )} : 25

二次equationの解:

x = 0, x = 25