64x^2-80x+25=0

解

64 x^{2} - 80 x + 25 = 0

x = \frac{5}{8}

十進法表記

x = 0.625

解答ステップ

64 x^{2} - 80 x + 25 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 80 ) \pm ( - 80 ) ^{2} - 4 \cdot 64 \cdot 25}{2 \cdot 64}

(- 80)^{2} - 4 \cdot 64 \cdot 25 = 0

x_{1, 2} = \frac{- ( - 80 ) \pm 0}{2 \cdot 64}

x = \frac{- ( - 80 )}{2 \cdot 64}

\frac{- ( - 80 )}{2 \cdot 64} = \frac{5}{8}

x = \frac{5}{8}

二次equationの解:

x = \frac{5}{8}