solve in R:
Write it as $\displaystyle \displaystyle \begin{align*} X^4 - 4X^3 + 8X^2 - 4X + 3 = 0 \end{align*}$ with $\displaystyle \displaystyle \begin{align*} X = x^2 \end{align*}$, which can be solved using the Quartic Formula. Then solve for $\displaystyle \displaystyle \begin{align*} x \end{align*}$...
I suggest this solution
http://www.mathmontada.net/vb/upload...373049942.docx