quadraticformula x^2+9x-10=0

解

x^{2} + 9 x - 10 = 0

x = 1, x = - 10

解答ステップ

x^{2} + 9 x - 10 = 0

解くとthe二次式

x_{1, 2} = \frac{- 9 \pm 9 ^{2} - 4 \cdot 1 \cdot ( - 10 )}{2 \cdot 1}

9^{2} - 4 \cdot 1 \cdot (- 10) = 11

x_{1, 2} = \frac{- 9 \pm 11}{2 \cdot 1}

解を分離する

x_{1} = \frac{- 9 + 11}{2 \cdot 1}, x_{2} = \frac{- 9 - 11}{2 \cdot 1}

x = \frac{- 9 + 11}{2 \cdot 1} : 1

x = \frac{- 9 - 11}{2 \cdot 1} : - 10

二次equationの解:

x = 1, x = - 10