展开 ((600(520-x))/((x)))-345

解答

展开

(\frac{600 ( 520 - x )}{( x )}) - 345

\frac{312000}{x} - 945

求解步骤

(\frac{600 ( 520 - x )}{x}) - 345

去除括号:

(a) = a

= \frac{600 ( 520 - x )}{x} - 345

乘开

600 (520 - x) : 312000 - 600 x

= \frac{- 600 x + 312000}{x} - 345

使用分式法则:

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

\frac{312000 - 600 x}{x} = \frac{312000}{x} - \frac{600 x}{x}

= \frac{312000}{x} - \frac{600 x}{x} - 345

消掉

\frac{600 x}{x} : 600

= \frac{312000}{x} - 600 - 345

数字相减:

- 600 - 345 = - 945

= \frac{312000}{x} - 945

e x p an d + 1 - (x + 4 y^{2}) \cdot d y + d y d x

e x p an d (3 e^{2} + 5 y) (2 e^{3} + 8 z)

e x p an d \frac{d}{d x} ((2 - x) e^{x}) + 2 - x

e x p an d - 5 (2 x + 2 y = - 20)

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