展开 (s+2)/((s+1)(s^2+4))

解答

展开

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

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

求解步骤

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

乘开

(s + 1) (s^{2} + 4) : s^{3} + 4 s + s^{2} + 4

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

s im pl i f y 4 x^{2} \cdot (\frac{15}{x} - \frac{2 x}{5})

e x p an d \frac{( 8 )}{( s + 4 ) ( s ^{2} + 2 s + 2 )}

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

e x p an d \frac{( s - 2 ) ( 3 s + 1 ) ^{2}}{9}

e x p an d - \frac{4 s}{( s + 6 ) ( s + 2 )}