展开-(12(6+sqrt(2)))/(17)

解答

展开

- \frac{12 ( 6 + 2 )}{17}

- \frac{72}{17} - \frac{12 2}{17}

十进制

- 5.23356 \dots

求解步骤

- \frac{12 ( 6 + 2 )}{17}

乘开

12 (6 + 2) : 72 + 122

= - \frac{72 + 12 2}{17}

使用分式法则:

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

\frac{72 + 12 2}{17} = - (\frac{72}{17}) - (\frac{12 2}{17})

= - (\frac{72}{17}) - (\frac{12 2}{17})

去除括号:

(a) = a

= - \frac{72}{17} - \frac{12 2}{17}

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