展开 (3(3-sqrt(17)))/8

解答

展开

\frac{3 ( 3 - 17 )}{8}

\frac{9}{8} - \frac{3 17}{8}

十进制

- 0.42116 \dots

求解步骤

\frac{3 ( 3 - 17 )}{8}

乘开

3 (3 - 17) : 9 - 317

= \frac{9 - 3 17}{8}

使用分式法则:

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

\frac{9 - 3 17}{8} = \frac{9}{8} - \frac{3 17}{8}

= \frac{9}{8} - \frac{3 17}{8}

s im pl i f y (x + \frac{1}{x}) (x - \frac{1}{x} + 1)

\frac{d}{d x} ((z) (x^{3} + y^{3} + z^{3} + 6 x y z - 2))

e x p an d (x + 3) (x + 2)

e x p an d (1 + sec (y))^{2}

e x p an d \frac{5 e ^{2 x} ( 2 x - 3 )}{x ^{4}}