-x^2+10x+11=0

解

- x^{2} + 10 x + 11 = 0

x = - 1, x = 11

解答ステップ

- x^{2} + 10 x + 11 = 0

解くとthe二次式

x_{1, 2} = \frac{- 10 \pm 1 0 ^{2} - 4 ( - 1 ) \cdot 11}{2 ( - 1 )}

1 0^{2} - 4 (- 1) \cdot 11 = 12

x_{1, 2} = \frac{- 10 \pm 12}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- 10 + 12}{2 ( - 1 )}, x_{2} = \frac{- 10 - 12}{2 ( - 1 )}

x = \frac{- 10 + 12}{2 ( - 1 )} : - 1

x = \frac{- 10 - 12}{2 ( - 1 )} : 11

二次equationの解:

x = - 1, x = 11