簡約-19.6(45/196)^2+9(45/196)+3

解

簡約

- 19.6 (\frac{45}{196})^{2} + 9 (\frac{45}{196}) + 3

\frac{1581}{392}

十進法表記

4.03316 \dots

解答ステップ

- 19.6 (\frac{45}{196})^{2} + 9 (\frac{45}{196}) + 3

19.6 = \frac{98}{5}

= - \frac{98}{5} (\frac{45}{196})^{2} + 9 \cdot \frac{45}{196} + 3

- \frac{98}{5} (\frac{45}{196})^{2} = - \frac{405}{392}

9 \cdot \frac{45}{196} = \frac{405}{196}

= - \frac{405}{392} + \frac{405}{196} + 3

- \frac{405}{392} + \frac{405}{196} + 3 = \frac{1581}{392}

= \frac{1581}{392}