展开 (2(sqrt(79)-4))/3

解答

展开

\frac{2 ( 79 - 4 )}{3}

\frac{2 79}{3} - \frac{8}{3}

十进制

3.25879 \dots

求解步骤

\frac{2 ( 79 - 4 )}{3}

乘开

2 (79 - 4) : 279 - 8

= \frac{2 79 - 8}{3}

使用分式法则:

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

\frac{2 79 - 8}{3} = \frac{2 79}{3} - \frac{8}{3}

= \frac{2 79}{3} - \frac{8}{3}

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