展开 ((4s+5))/(((s+3)(s-4)^2))

解答

展开

\frac{( 4 s + 5 )}{( ( s + 3 ) ( s - 4 ) ^{2} )}

\frac{4 s + 5}{s ^{3} - 5 s ^{2} - 8 s + 48}

求解步骤

\frac{4 s + 5}{( s + 3 ) ( s - 4 ) ^{2}}

(s - 4)^{2} = s^{2} - 8 s + 16

= \frac{4 s + 5}{( s + 3 ) ( s ^{2} - 8 s + 16 )}

乘开

(s + 3) (s^{2} - 8 s + 16) : s^{3} - 5 s^{2} - 8 s + 48

= \frac{4 s + 5}{s ^{3} - 5 s ^{2} - 8 s + 48}

e x p an d (z^{2} + π^{2})^{2}

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

e x p an d (4 E (x, y) x - 5 E (x, y) y = 14.17) x - 2

e x p an d \frac{2 x + 2 sin ( 2 x ) ( x ^{2} + 1 )}{cos ( 2 x )}

e x p an d \frac{( x ^{2} - 3 x - 4 b - 12 )}{x ( x + b )}