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 8 0 ^{2} - 4 \cdot 64 \cdot 25}{2 \cdot 64}

8 0^{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}