lets try this latex thing out...

$\displaystyle 3x^4-2x^2-1=0$

I know I need to move the one to the other side, then I think factor our what is common, in this case.. it would be a x^2 right? so I get to

$\displaystyle x^2(3x^2-2)=1$

I get stumped after that.

Another one I have is

$\displaystyle x^6+7x^3-8=0$