展开 (5(77-sqrt(745)))/2

解答

展开

\frac{5 ( 77 - 745 )}{2}

\frac{385}{2} - \frac{5 745}{2}

十进制

124.26327 \dots

求解步骤

\frac{5 ( 77 - 745 )}{2}

乘开

5 (77 - 745) : 385 - 5745

= \frac{385 - 5 745}{2}

使用分式法则:

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

\frac{385 - 5 745}{2} = \frac{385}{2} - \frac{5 745}{2}

= \frac{385}{2} - \frac{5 745}{2}

e x p an d (x^{2} + π)^{4}

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e x p an d \frac{x - 5}{( x + 1 ) ^{3}}

e x p an d (y + 2) d x + (x - 2) d y

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