-5x^2-60x-180=0

解

- 5 x^{2} - 60 x - 180 = 0

x = - 6

解答ステップ

- 5 x^{2} - 60 x - 180 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 60 ) \pm ( - 60 ) ^{2} - 4 ( - 5 ) ( - 180 )}{2 ( - 5 )}

(- 60)^{2} - 4 (- 5) (- 180) = 0

x_{1, 2} = \frac{- ( - 60 ) \pm 0}{2 ( - 5 )}

x = \frac{- ( - 60 )}{2 ( - 5 )}

\frac{- ( - 60 )}{2 ( - 5 )} = - 6

x = - 6

二次equationの解:

x = - 6