quadraticformula x^2+6x=7

解

x^{2} + 6 x = 7

x = 1, x = - 7

解答ステップ

x^{2} + 6 x = 7

7

を左側に移動します

x^{2} + 6 x - 7 = 0

解くとthe二次式

x_{1, 2} = \frac{- 6 \pm 6 ^{2} - 4 \cdot 1 \cdot ( - 7 )}{2 \cdot 1}

6^{2} - 4 \cdot 1 \cdot (- 7) = 8

x_{1, 2} = \frac{- 6 \pm 8}{2 \cdot 1}

解を分離する

x_{1} = \frac{- 6 + 8}{2 \cdot 1}, x_{2} = \frac{- 6 - 8}{2 \cdot 1}

x = \frac{- 6 + 8}{2 \cdot 1} : 1

x = \frac{- 6 - 8}{2 \cdot 1} : - 7

二次equationの解:

x = 1, x = - 7