x^2+3x-180=0

解

x^{2} + 3 x - 180 = 0

x = 12, x = - 15

解答ステップ

x^{2} + 3 x - 180 = 0

解くとthe二次式

x_{1, 2} = \frac{- 3 \pm 3 ^{2} - 4 \cdot 1 \cdot ( - 180 )}{2 \cdot 1}

3^{2} - 4 \cdot 1 \cdot (- 180) = 27

x_{1, 2} = \frac{- 3 \pm 27}{2 \cdot 1}

解を分離する

x_{1} = \frac{- 3 + 27}{2 \cdot 1}, x_{2} = \frac{- 3 - 27}{2 \cdot 1}

x = \frac{- 3 + 27}{2 \cdot 1} : 12

x = \frac{- 3 - 27}{2 \cdot 1} : - 15

二次equationの解:

x = 12, x = - 15