9x^8 +2x^4+1=0
let y=x^4 & yu hav 9y^2 +2y+1=0
quadratik equashun giv roots av y=-(1/9) +0.314268052i (komplex variabels)
Then yu gotta take 4th root av this tu get bak tu x
(first put it in polar form: size=0.3333317979434611 & angel=-1.2309577888 rads)