-x^2-10x-25=0

解

- x^{2} - 10 x - 25 = 0

x = - 5

解答ステップ

- x^{2} - 10 x - 25 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 10 ) \pm ( - 10 ) ^{2} - 4 ( - 1 ) ( - 25 )}{2 ( - 1 )}

(- 10)^{2} - 4 (- 1) (- 25) = 0

x_{1, 2} = \frac{- ( - 10 ) \pm 0}{2 ( - 1 )}

x = \frac{- ( - 10 )}{2 ( - 1 )}

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

x = - 5

二次equationの解:

x = - 5