展开 (s+5)/((s+1)(s-3))

解答

展开

\frac{s + 5}{( s + 1 ) ( s - 3 )}

\frac{s + 5}{s ^{2} - 2 s - 3}

求解步骤

\frac{s + 5}{( s + 1 ) ( s - 3 )}

乘开

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

= \frac{s + 5}{s ^{2} - 2 s - 3}

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

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

e x p an d \frac{4 x + 3}{( x - 1 ) ^{2}}

e x p an d \frac{1}{( x - 4 ) ^{3}}

e x p an d (2 x y^{2} + 9 x^{2}) d x + (2 x^{2} y) d y