展开-(2u(18y+12x))/(v^3)

解答

展开

- \frac{2 u ( 18 y + 12 x )}{v ^{3}}

- \frac{36 u y}{v ^{3}} - \frac{24 ux}{v ^{3}}

求解步骤

- \frac{2 u ( 18 y + 12 x )}{v ^{3}}

乘开

2 u (18 y + 12 x) : 36 u y + 24 ux

= - \frac{36 u y + 24 ux}{v ^{3}}

使用分式法则:

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

\frac{36 u y + 24 ux}{v ^{3}} = - (\frac{36 u y}{v ^{3}}) - (\frac{24 ux}{v ^{3}})

= - (\frac{36 u y}{v ^{3}}) - (\frac{24 ux}{v ^{3}})

去除括号:

(a) = a

= - \frac{36 u y}{v ^{3}} - \frac{24 ux}{v ^{3}}

e x p an d \frac{s + 9}{( s + 1 ) ( s ^{2} + 2 s + 2 )}

e x p an d \frac{24}{( x - 3 ) ^{5}}

e x p an d \frac{( 8 ( a + h ) - 1 )}{( 9 ( a + h ) + 4 )}

e x p an d (- 3 + j)^{6}

e x p an d \frac{9 + h - 3}{h}