What are the possible number of positive real, negative real, and complex zeros of f(x) = 8x4 + 13x3 – 11x2 + x + 9

Question

What are the possible number of positive real, negative real, and complex zeros of  f(x) = 8x4 + 13x3 – 11x2 + x + 9

anonymous · Answer

Look for the # of sign changes for positive reals and separately for negative reals.  The maximum # of each is the number of sign changes.  The actual # is the maximum or a number successively less than that by 2 or 4 or 6, etc, until you hit 0.

anonymous · Answer

Alright Thanks

anonymous · Answer

Positive Real: 2 or 0
Negative Real: 2 or 0
Complex: 4, 2 or 0 Im Guessing THis Is My Answer Right

anonymous · Answer

Yes, very good.

anonymous · Answer

Thanks For The Help

anonymous · Answer

good luck to you in all of your studies.