Talk:Quadratic equation/Advanced

"Fortunately, there exists a simple closed formula ..." Well, yes, but there exists a complicated closed formula for cubic equations, but that's not all that fortunate as in the general case it requires finding the cube root of a complex number, which is not a straightforward operation like the square root. In fact oit seems to be much the same as solving a cubic equation. I think the closed form isn't the relevant point. Peter Jackson 18:04, 4 December 2008 (UTC)