-3x^2+15x-18=0

解

- 3 x^{2} + 15 x - 18 = 0

x = 2, x = 3

解答ステップ

- 3 x^{2} + 15 x - 18 = 0

解くとthe二次式

x_{1, 2} = \frac{- 15 \pm 1 5 ^{2} - 4 ( - 3 ) ( - 18 )}{2 ( - 3 )}

1 5^{2} - 4 (- 3) (- 18) = 3

x_{1, 2} = \frac{- 15 \pm 3}{2 ( - 3 )}

解を分離する

x_{1} = \frac{- 15 + 3}{2 ( - 3 )}, x_{2} = \frac{- 15 - 3}{2 ( - 3 )}

x = \frac{- 15 + 3}{2 ( - 3 )} : 2

x = \frac{- 15 - 3}{2 ( - 3 )} : 3

二次equationの解:

x = 2, x = 3