展开 (3(1+sqrt(6)))/5

解答

展开

\frac{3 ( 1 + 6 )}{5}

\frac{3}{5} + \frac{3 6}{5}

十进制

2.06969 \dots

求解步骤

\frac{3 ( 1 + 6 )}{5}

乘开

3 (1 + 6) : 3 + 36

= \frac{3 + 3 6}{5}

使用分式法则:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{3 + 3 6}{5} = \frac{3}{5} + \frac{3 6}{5}

= \frac{3}{5} + \frac{3 6}{5}

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