3x^2=40

解

3 x^{2} = 40

x = \frac{2 10}{3}, x = - \frac{2 10}{3}

十進法表記

x = 3.65148 \dots, x = - 3.65148 \dots

解答ステップ

3 x^{2} = 40

以下で両辺を割る

3

x^{2} = \frac{40}{3}

x^{2} = f (a)

の場合, 解は

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

x = \frac{40}{3}, x = - \frac{40}{3}

\frac{40}{3} = \frac{2 10}{3}

- \frac{40}{3} = - \frac{2 10}{3}

x = \frac{2 10}{3}, x = - \frac{2 10}{3}