quadraticformula x^2+3x-72=0

解

x^{2} + 3 x - 72 = 0

x = \frac{- 3 + 3 33}{2}, x = \frac{- 3 - 3 33}{2}

十進法表記

x = 7.11684 \dots, x = - 10.11684 \dots

解答ステップ

x^{2} + 3 x - 72 = 0

解くとthe二次式

x_{1, 2} = \frac{- 3 \pm 3 ^{2} - 4 \cdot 1 \cdot ( - 72 )}{2 \cdot 1}

3^{2} - 4 \cdot 1 \cdot (- 72) = 333

x_{1, 2} = \frac{- 3 \pm 3 33}{2 \cdot 1}

解を分離する

x_{1} = \frac{- 3 + 3 33}{2 \cdot 1}, x_{2} = \frac{- 3 - 3 33}{2 \cdot 1}

x = \frac{- 3 + 3 33}{2 \cdot 1} : \frac{- 3 + 3 33}{2}

x = \frac{- 3 - 3 33}{2 \cdot 1} : \frac{- 3 - 3 33}{2}

二次equationの解:

x = \frac{- 3 + 3 33}{2}, x = \frac{- 3 - 3 33}{2}