展开 (3(sqrt(11)-sqrt(3)))/2

解答

展开

\frac{3 ( 11 - 3 )}{2}

\frac{3 11}{2} - \frac{3 3}{2}

十进制

2.37686 \dots

求解步骤

\frac{3 ( 11 - 3 )}{2}

乘开

3 (11 - 3) : 311 - 33

= \frac{3 11 - 3 3}{2}

使用分式法则:

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

\frac{3 11 - 3 3}{2} = \frac{3 11}{2} - \frac{3 3}{2}

= \frac{3 11}{2} - \frac{3 3}{2}

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