H henry08 Active Member Joined Mar 13, 2008 Messages 1,174 Gender Male HSC N/A Mar 6, 2010 #1 Use the quadratic formula to find all complex roots of the following polynomial: z^2 + z + 1 How would I do this question?
Use the quadratic formula to find all complex roots of the following polynomial: z^2 + z + 1 How would I do this question?
shaon0 ... Joined Mar 26, 2008 Messages 2,029 Location Guess Gender Male HSC 2009 Mar 6, 2010 #2 henry08 said: Use the quadratic formula to find all complex roots of the following polynomial: z^2 + z + 1 How would I do this question? Click to expand... z=(-1+-sqrt(1^2-4))/2 =(-1+-isqrt(3))/2
henry08 said: Use the quadratic formula to find all complex roots of the following polynomial: z^2 + z + 1 How would I do this question? Click to expand... z=(-1+-sqrt(1^2-4))/2 =(-1+-isqrt(3))/2
H henry08 Active Member Joined Mar 13, 2008 Messages 1,174 Gender Male HSC N/A Mar 6, 2010 #4 sikhman said: lol this from the algebra booklet? just literally plug the coefficients into the quadratic formula (it just uses z instead of x) when you get the negative in the square root, just make it positive and write i out the front of the square root sign. Click to expand... Yes lol. Yeah, z is what was confusing me/
sikhman said: lol this from the algebra booklet? just literally plug the coefficients into the quadratic formula (it just uses z instead of x) when you get the negative in the square root, just make it positive and write i out the front of the square root sign. Click to expand... Yes lol. Yeah, z is what was confusing me/
