Hello!

I am looking for the roots of the following equation:

$\displaystyle -2.3704s^6-3.5555s^4-1.333s^2+1$

I was told to use the substitution $\displaystyle x=s^2$ but I still can't figure out how to do it. This has to be solved in an exam as part of a bigger question and should not take longer than a minute, so I can't go for other approches.

Thanks,

Uli