25v^2-20v+4=0

解

25 v^{2} - 20 v + 4 = 0

v = \frac{2}{5}

十進法表記

v = 0.4

解答ステップ

25 v^{2} - 20 v + 4 = 0

解くとthe二次式

v_{1, 2} = \frac{- ( - 20 ) \pm ( - 20 ) ^{2} - 4 \cdot 25 \cdot 4}{2 \cdot 25}

(- 20)^{2} - 4 \cdot 25 \cdot 4 = 0

v_{1, 2} = \frac{- ( - 20 ) \pm 0}{2 \cdot 25}

v = \frac{- ( - 20 )}{2 \cdot 25}

\frac{- ( - 20 )}{2 \cdot 25} = \frac{2}{5}

v = \frac{2}{5}

二次equationの解:

v = \frac{2}{5}