x^2-120x+3500=0

解

x^{2} - 120 x + 3500 = 0

x = 70, x = 50

解答ステップ

x^{2} - 120 x + 3500 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 120 ) \pm ( - 120 ) ^{2} - 4 \cdot 1 \cdot 3500}{2 \cdot 1}

(- 120)^{2} - 4 \cdot 1 \cdot 3500 = 20

x_{1, 2} = \frac{- ( - 120 ) \pm 20}{2 \cdot 1}

解を分離する

x_{1} = \frac{- ( - 120 ) + 20}{2 \cdot 1}, x_{2} = \frac{- ( - 120 ) - 20}{2 \cdot 1}

x = \frac{- ( - 120 ) + 20}{2 \cdot 1} : 70

x = \frac{- ( - 120 ) - 20}{2 \cdot 1} : 50

二次equationの解:

x = 70, x = 50