x^2-42x-88=0

解

x^{2} - 42 x - 88 = 0

x = 44, x = - 2

解答ステップ

x^{2} - 42 x - 88 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 42 ) \pm ( - 42 ) ^{2} - 4 \cdot 1 \cdot ( - 88 )}{2 \cdot 1}

(- 42)^{2} - 4 \cdot 1 \cdot (- 88) = 46

x_{1, 2} = \frac{- ( - 42 ) \pm 46}{2 \cdot 1}

解を分離する

x_{1} = \frac{- ( - 42 ) + 46}{2 \cdot 1}, x_{2} = \frac{- ( - 42 ) - 46}{2 \cdot 1}

x = \frac{- ( - 42 ) + 46}{2 \cdot 1} : 44

x = \frac{- ( - 42 ) - 46}{2 \cdot 1} : - 2

二次equationの解:

x = 44, x = - 2