r^2-4/9 =0

解

r^{2} - \frac{4}{9} = 0

r = \frac{2}{3}, r = - \frac{2}{3}

十進法表記

r = 0.66666 \dots, r = - 0.66666 \dots

解答ステップ

r^{2} - \frac{4}{9} = 0

\frac{4}{9}

を右側に移動します

r^{2} = \frac{4}{9}

x^{2} = f (a)

の場合, 解は

x = f (a), - f (a)

r = \frac{4}{9}, r = - \frac{4}{9}

\frac{4}{9} = \frac{2}{3}

- \frac{4}{9} = - \frac{2}{3}

r = \frac{2}{3}, r = - \frac{2}{3}