5x^2-80x+320=0

解

5 x^{2} - 80 x + 320 = 0

x = 8

解答ステップ

5 x^{2} - 80 x + 320 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 80 ) \pm ( - 80 ) ^{2} - 4 \cdot 5 \cdot 320}{2 \cdot 5}

(- 80)^{2} - 4 \cdot 5 \cdot 320 = 0

x_{1, 2} = \frac{- ( - 80 ) \pm 0}{2 \cdot 5}

x = \frac{- ( - 80 )}{2 \cdot 5}

\frac{- ( - 80 )}{2 \cdot 5} = 8

x = 8

二次equationの解:

x = 8