solvefor x,9x^2-12x+4=0

解

x, 9 x^{2} - 12 x + 4 = 0

x = \frac{2}{3}

十進法表記

x = 0.66666 \dots

解答ステップ

9 x^{2} - 12 x + 4 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 12 ) \pm ( - 12 ) ^{2} - 4 \cdot 9 \cdot 4}{2 \cdot 9}

(- 12)^{2} - 4 \cdot 9 \cdot 4 = 0

x_{1, 2} = \frac{- ( - 12 ) \pm 0}{2 \cdot 9}

x = \frac{- ( - 12 )}{2 \cdot 9}

\frac{- ( - 12 )}{2 \cdot 9} = \frac{2}{3}

x = \frac{2}{3}

二次equationの解:

x = \frac{2}{3}