How can I use "eig" in symbolic variables?

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masoud jiryaei
masoud jiryaei 2019-9-4
评论： Mario C 2022-6-14
How can I use "eig" in symbolic variables?
I have this Equation : [A]*{x}=(omega)^2*[B]*{x}
which A=[2a+3b ,2b+3a ; a+b,a-b] And B=[5a+8b, b^2+5 ; a-5b,2b+3a]
and want to use "eig" for it.

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KSSV
KSSV 2019-9-4
编辑：KSSV 2019-9-4
syms a b l
A=[2*a+3*b ,2*b+3*a ; a+b,a-b] ;
B=[5*a+8*b, b^2+5 ; a-5*b,2*b+3*a] ;
C = A-l^2*B ;
eqn= det(C)==0 ;
iwant = solve(eqn,l)

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