x^2+2x-360=0

解

x^{2} + 2 x - 360 = 0

x = 18, x = - 20

解答ステップ

x^{2} + 2 x - 360 = 0

解くとthe二次式

x_{1, 2} = \frac{- 2 \pm 2 ^{2} - 4 \cdot 1 \cdot ( - 360 )}{2 \cdot 1}

2^{2} - 4 \cdot 1 \cdot (- 360) = 38

x_{1, 2} = \frac{- 2 \pm 38}{2 \cdot 1}

解を分離する

x_{1} = \frac{- 2 + 38}{2 \cdot 1}, x_{2} = \frac{- 2 - 38}{2 \cdot 1}

x = \frac{- 2 + 38}{2 \cdot 1} : 18

x = \frac{- 2 - 38}{2 \cdot 1} : - 20

二次equationの解:

x = 18, x = - 20