-x^2-2x+35=0

解

- x^{2} - 2 x + 35 = 0

x = - 7, x = 5

解答ステップ

- x^{2} - 2 x + 35 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 ( - 1 ) \cdot 35}{2 ( - 1 )}

(- 2)^{2} - 4 (- 1) \cdot 35 = 12

x_{1, 2} = \frac{- ( - 2 ) \pm 12}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- ( - 2 ) + 12}{2 ( - 1 )}, x_{2} = \frac{- ( - 2 ) - 12}{2 ( - 1 )}

x = \frac{- ( - 2 ) + 12}{2 ( - 1 )} : - 7

x = \frac{- ( - 2 ) - 12}{2 ( - 1 )} : 5

二次equationの解:

x = - 7, x = 5