展开-((s^3+s^2+6s-2)/(s(s+3)(s-1)))

解答

展开

- (\frac{s ^{3} + s ^{2} + 6 s - 2}{s ( s + 3 ) ( s - 1 )})

- \frac{s ^{3} + s ^{2} + 6 s - 2}{s ^{3} + 2 s ^{2} - 3 s}

求解步骤

- (\frac{s ^{3} + s ^{2} + 6 s - 2}{s ( s + 3 ) ( s - 1 )})

去除括号:

(a) = a

= - \frac{s ^{3} + s ^{2} + 6 s - 2}{s ( s + 3 ) ( s - 1 )}

乘开

s (s + 3) (s - 1) : s^{3} + 2 s^{2} - 3 s

= - \frac{s ^{3} + s ^{2} + 6 s - 2}{s ^{3} + 2 s ^{2} - 3 s}

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

e x p an d (t cos (u), t sin (u), u) \cdot (sin (u), - cos (u), t)

s im pl i f y (2 a + b) (2 a - b)

e x p an d (3 x + \frac{2}{x})^{8}

e x p an d (3 - 4 i) (3 + 4 i)