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Cuz for Part a u do (z^2)^3 - 1 = 0a) fully factorise z^6-1=0 over the rational field
b) solve z^2+z^4+z^6 over the complex field
how do you use part a to do part b?
for a) z^6-1 = 0 -> (z^3-1)(z^3+1)=0 -> (z-1)(z^2+z+1)(z+1)(z^2-z+1)=0 using difference of squares, now z^2+z+1 and z^2-z+1 have complex roots so we do not factorise any furthera) fully factorise z^6-1=0 over the rational field
b) solve z^2+z^4+z^6 over the complex field
how do you use part a to do part b?