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s1,2=(-4 (+-) j3) 10^3

are roots of a second order D.E of a series RLC ckt

where s1,2=(-z (+-) (z^2 -1)

(z is zeta)

now from

s1,2=(-4 (+-) j3) 10^3 ,its showing roots of underdamped ckt(complex nd conjugate)

but when i solve eq. z gives 2 values(but z must be less than 1 nd gr8er than 0 acc. 2 condition of underdamped ckt)

help plz

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# Help with RLC circuit

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