Talk:Finding roots of polynomials

From SymPy

The example for latex(roots(...)) doesn't work as written on the page.

Python 2.5.2 console for SymPy 0.6.1

In [1]: print latex(roots(x**3+2*x**2+8,x))
$\begin{Bmatrix}\end{Bmatrix}$

In [2]: print latex(solve(x**3+2*x**2+8,x))
$\begin{bmatrix}\frac{- 18 \left(1044 + 108 \sqrt{93}\right)^{\frac{1}{3}} - 36
{3}^{\frac{2}{3}} - 3 {3}^{\frac{1}{3}} \left(1044 + 108 \sqrt{93}\right)^{\frac{2}{3}}}{27 \left(1044 + 108 \sqrt{93}\right)^{\frac{1}{3}}}, & \frac{- 174 \mathbf{\imath} {3}^{\frac{5}{6}} - 2 \left(1044 + 108 \sqrt{93}\right)^{\frac{2}{3}} - 54 \mathbf{\imath} {3}^{\frac{1}{3}} \sqrt{31} + 2 {3}^{\frac{2}{3}} \left(1044 + 108 \sqrt{93}\right)^{\frac{1}{3}} + 18 {3}^{\frac{1}{3}} \sqrt{93} + 6 \mathbf{\imath} {3}^{\frac{1}{6}} \left(1044 + 108 \sqrt{93}\right)^{\frac{1}{3}}
+ 174 {3}^{\frac{1}{3}}}{3 \left(1044 + 108 \sqrt{93}\right)^{\frac{2}{3}}}, & \frac{- 2 \left(1044 + 108 \sqrt{93}\right)^{\frac{2}{3}} + 2 {3}^{\frac{2}{3}} \left(1044 + 108 \sqrt{93}\right)^{\frac{1}{3}} + 54 \mathbf{\imath} {3}^{\frac{1}{3}} \sqrt{31} + 18 {3}^{\frac{1}{3}} \sqrt{93} - 6 \mathbf{\imath} {3}^{\frac{1}{6}} \left(1044 + 108 \sqrt{93}\right)^{\frac{1}{3}} + 174 {3}^{\frac{1}{3}} + 174 \mathbf{\imath} {3}^{\frac{5}{6}}}{3 \left(1044 + 108 \sqrt{93}\right)^{\frac{2}{3}}}\end{bmatrix}$

ab 23:24, 2 August 2008 (UTC)