# Question: suppose that a characteristic polynomial of 9th decree consists of...

###### Question details

Suppose that a characteristic polynomial of 9th decree
consists of an even polynomial factor of 6th degree.

The even polynomial has 2 RHP(right half plane that not include
imaginary axis)poles,and the non-even one also has 2 RHP
poles.

(a)How many poles of the char. equation lie in the LHP(left half
plane that not include imaginary axis )?

(b)How many poles lie on the imaginary axis ??