展开 ((s-1)(s+3))/(s(s+4)(s+2))

解答

展开

\frac{( s - 1 ) ( s + 3 )}{s ( s + 4 ) ( s + 2 )}

\frac{s ^{2} + 2 s - 3}{s ^{3} + 6 s ^{2} + 8 s}

求解步骤

\frac{( s - 1 ) ( s + 3 )}{s ( s + 4 ) ( s + 2 )}

乘开

s (s + 4) (s + 2) : s^{3} + 6 s^{2} + 8 s

= \frac{( s - 1 ) ( s + 3 )}{s ^{3} + 6 s ^{2} + 8 s}

乘开

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

= \frac{s ^{2} + 2 s - 3}{s ^{3} + 6 s ^{2} + 8 s}

e x p an d \frac{d}{d x} ((x - 2) (x - 10)^{3}) + 11

e x p an d y^{''} (x) + (1 + x) y

e x p an d \frac{\frac{1}{( 2 x + 2 h )} - \frac{1}{( 2 x )}}{h}

e x p an d, (270 + 905) c m^{3}

e x p an d 1000 (1 + \frac{i}{12})^{12}