49s^2-14s+1=0

解

49 s^{2} - 14 s + 1 = 0

s = \frac{1}{7}

十進法表記

s = 0.14285 \dots

解答ステップ

49 s^{2} - 14 s + 1 = 0

解くとthe二次式

s_{1, 2} = \frac{- ( - 14 ) \pm ( - 14 ) ^{2} - 4 \cdot 49 \cdot 1}{2 \cdot 49}

(- 14)^{2} - 4 \cdot 49 \cdot 1 = 0

s_{1, 2} = \frac{- ( - 14 ) \pm 0}{2 \cdot 49}

s = \frac{- ( - 14 )}{2 \cdot 49}

\frac{- ( - 14 )}{2 \cdot 49} = \frac{1}{7}

s = \frac{1}{7}

二次equationの解:

s = \frac{1}{7}