25/2 x^2-30x+18=0

解

\frac{25}{2} x^{2} - 30 x + 18 = 0

x = \frac{6}{5}

十進法表記

x = 1.2

解答ステップ

\frac{25}{2} x^{2} - 30 x + 18 = 0

以下で両辺を乗じる:

2

25 x^{2} - 60 x + 36 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 60 ) \pm ( - 60 ) ^{2} - 4 \cdot 25 \cdot 36}{2 \cdot 25}

(- 60)^{2} - 4 \cdot 25 \cdot 36 = 0

x_{1, 2} = \frac{- ( - 60 ) \pm 0}{2 \cdot 25}

x = \frac{- ( - 60 )}{2 \cdot 25}

\frac{- ( - 60 )}{2 \cdot 25} = \frac{6}{5}

x = \frac{6}{5}

二次equationの解:

x = \frac{6}{5}