展开 (2(7-sqrt(41)))/7

解答

展开

\frac{2 ( 7 - 41 )}{7}

2 - \frac{2 41}{7}

十进制

0.17053 \dots

求解步骤

\frac{2 ( 7 - 41 )}{7}

乘开

2 (7 - 41) : 14 - 241

= \frac{14 - 2 41}{7}

使用分式法则:

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

\frac{14 - 2 41}{7} = \frac{14}{7} - \frac{2 41}{7}

= \frac{14}{7} - \frac{2 41}{7}

数字相除:

\frac{14}{7} = 2

= 2 - \frac{2 41}{7}

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