3S^4+18S^3+30S^2+18S+3=0 没分了,

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3S^4+18S^3+30S^2+18S+3=0没分了,3S^4+18S^3+30S^2+18S+3=0没分了,3S^4+18S^3+30S^2+18S+3=0没分了,3S^4+18S^3+30S^2

3S^4+18S^3+30S^2+18S+3=0 没分了,
3S^4+18S^3+30S^2+18S+3=0 没分了,

3S^4+18S^3+30S^2+18S+3=0 没分了,
3S^4+18S^3+30S^2+18S+3=0
S^4+6S^3+10S^2+6S+1=0
S^4+S^3+5S^3+5S^2+5S^2+5S+S+1=0
S^3(S+1)+5S^2(S+1)+5S(S+1)+(S+1)=0
(S+1)(S^3+5S^2+5S+1)=0
S1=-1
S^3+5S^2+5S+1=0
S^3+S^2+4S^2+4S+S+1=0
(S^3+S^2)+(4S^2+4S)+(S+1)=0
S^2(S+1)+4S(S+1)+(S+1)=0
(S+1)(S^2+4S+1)=0
S2=-1
S^2+4S+1=0
S^2+4S+4=3
(S+2)^2=3
S+2=±√3
S=-2±√3
S3=-2+√3
S4=-2-√3

3s^4+18s^3+38s^2+32s+12=0求s=?s真么算阿? 1S,2S,3S,4S, 用MATLAB求出G(s)=(s*s+2s+2)/(s*s*s*s+7s*s*s+3s*s+5s+2)的极点 3S^4+18S^3+30S^2+18S+3=0 没分了, 0 S ; 1 2S ; 2 4S ; 3 8S ; 4 16S ; 5 32S.N （ )S 2S/(S/3 S/6)=4表示什么/ F(s)=(s+6)/(s×s+4s+3)(s+2)拉普拉斯的逆变换该怎么求? 求原函数x=(2s*s+12s+6)%s(s+2)(s+3) S-4S^2/3什么意思? 传递函数C(s)/R(s)=(s^5+4s^4+3s^3+2s^2+1)/(s^6+5s^5+2s^4+4s^3+s^2+2)求微分方程表达式拉氏变换F(S)=2s^2-4/(s+1)(s-2)(s-3)求f(s)是这个F(s)=（2s^2-4）/[(s+1)(s-2)(s-3)] 怎么如何分解因式s^4+3s^3+6s^2+15s+10 (s-1)分之2 +(2s+5)分之3 =S+4s等于多少求F(s)=(s+4)/(2s^2+3s+1)的拉普拉斯反变换 Y(s)=1/((s^2 +4s +3)*(s+1)) 的拉普拉斯逆变换是什么? Look!（）an eraser 1 That’s 2 This’s 3 What’s 4 Where’s 求拉氏反变换 (s+2)/(s*s+4s+3)的解法 matlab 传递函数知道G1(s)和G2(s),怎么在matlab中求出G(s).G1(s)=[1/(s+1) 1/(s+2);0 (s+1)/(s+2)];G2(s)=[1/(s+3) 1/(s+4);1/(s+1) 0];G(s)=[1+G1(s)*G2(s)]^(-1)*G1(s);