9x^2+36x-45=0

解

9 x^{2} + 36 x - 45 = 0

x = 1, x = - 5

解答ステップ

9 x^{2} + 36 x - 45 = 0

解くとthe二次式

x_{1, 2} = \frac{- 36 \pm 3 6 ^{2} - 4 \cdot 9 ( - 45 )}{2 \cdot 9}

3 6^{2} - 4 \cdot 9 (- 45) = 54

x_{1, 2} = \frac{- 36 \pm 54}{2 \cdot 9}

解を分離する

x_{1} = \frac{- 36 + 54}{2 \cdot 9}, x_{2} = \frac{- 36 - 54}{2 \cdot 9}

x = \frac{- 36 + 54}{2 \cdot 9} : 1

x = \frac{- 36 - 54}{2 \cdot 9} : - 5

二次equationの解:

x = 1, x = - 5