-100a^2+20a-1=0

解

- 100 a^{2} + 20 a - 1 = 0

a = \frac{1}{10}

十進法表記

a = 0.1

解答ステップ

- 100 a^{2} + 20 a - 1 = 0

解くとthe二次式

a_{1, 2} = \frac{- 20 \pm 2 0 ^{2} - 4 ( - 100 ) ( - 1 )}{2 ( - 100 )}

2 0^{2} - 4 (- 100) (- 1) = 0

a_{1, 2} = \frac{- 20 \pm 0}{2 ( - 100 )}

a = \frac{- 20}{2 ( - 100 )}

\frac{- 20}{2 ( - 100 )} = \frac{1}{10}

a = \frac{1}{10}

二次equationの解:

a = \frac{1}{10}