Question: E6.18 A system has a characteristic equation q s ( ) = + s s 3 2 + + 9 9 s = 0. (a)

E6.18 A system has a characteristic equation

q s( ) = + s s 3 2 + + 9 9 s = 0.

(a) Determine whether the system is stable, using the Routh–Hurwitz criterion.

(b) Determine the roots of the characteristic equation.

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