簡約-(2/3)^2+9(2/3)

解

簡約

- (\frac{2}{3})^{2} + 9 (\frac{2}{3})

\frac{50}{9}

十進法表記

5.55555 \dots

解答ステップ

- (\frac{2}{3})^{2} + 9 (\frac{2}{3})

規則を適用する:

(a) = a

(\frac{2}{3}) = \frac{2}{3}

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

(\frac{2}{3})^{2} = \frac{4}{9}

9 \cdot \frac{2}{3} = 6

= - \frac{4}{9} + 6

- \frac{4}{9} + 6 = \frac{50}{9}

= \frac{50}{9}