展开 1/(s(s^2+5s+4))

解答

展开

\frac{1}{s ( s ^{2} + 5 s + 4 )}

\frac{1}{s ^{3} + 5 s ^{2} + 4 s}

求解步骤

\frac{1}{s ( s ^{2} + 5 s + 4 )}

乘开

s (s^{2} + 5 s + 4) : s^{3} + 5 s^{2} + 4 s

= \frac{1}{s ^{3} + 5 s ^{2} + 4 s}

e x p an d (u^{2} + 2 e^{w uv} + e^{2 w} v^{2}) (u v^{2} + w^{4})

\frac{d}{d x} ((z (x)) (x y + y ln (x y)))

s im pl i f y 3 (2 + 2)

e x p an d \frac{- 2 \cdot x ^{2} + 1}{( x ^{2} + 1 ) ^{\frac{5}{2}}}

e x p an d (10 x - 3 y = 3, 6) - (2 x + 5 y = - 4)