-x^2+29x+342=0

解

- x^{2} + 29 x + 342 = 0

x = - 9, x = 38

解答ステップ

- x^{2} + 29 x + 342 = 0

解くとthe二次式

x_{1, 2} = \frac{- 29 \pm 2 9 ^{2} - 4 ( - 1 ) \cdot 342}{2 ( - 1 )}

2 9^{2} - 4 (- 1) \cdot 342 = 47

x_{1, 2} = \frac{- 29 \pm 47}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- 29 + 47}{2 ( - 1 )}, x_{2} = \frac{- 29 - 47}{2 ( - 1 )}

x = \frac{- 29 + 47}{2 ( - 1 )} : - 9

x = \frac{- 29 - 47}{2 ( - 1 )} : 38

二次equationの解:

x = - 9, x = 38