12x^2+60x+75=0

解

12 x^{2} + 60 x + 75 = 0

x = - \frac{5}{2}

十進法表記

x = - 2.5

解答ステップ

12 x^{2} + 60 x + 75 = 0

解くとthe二次式

x_{1, 2} = \frac{- 60 \pm 6 0 ^{2} - 4 \cdot 12 \cdot 75}{2 \cdot 12}

6 0^{2} - 4 \cdot 12 \cdot 75 = 0

x_{1, 2} = \frac{- 60 \pm 0}{2 \cdot 12}

x = \frac{- 60}{2 \cdot 12}

\frac{- 60}{2 \cdot 12} = - \frac{5}{2}

x = - \frac{5}{2}

二次equationの解:

x = - \frac{5}{2}