1||0|85|0|
0|0|0|||||Error in cubic formula|Bryan Clair|1|11:33:03|08/23/2009|There%27s a mistake on the CTK-wiki page about the Tartaglia-Cardano derivation of the solution to cubic equations.%0D%0A%0D%0AThe derivation sets x %3D p - q%2C then correctly proceeds to find p and q.%0D%0A%0D%0AAt the very last step there is a sign error on the q term and both p and q are written the same%2C so that in the final formula for the solution the two complicated terms cancel and give 0.%0D%0A%0D%0AWould someone with edit power please make the simple change and put the - sign in front of b%2F2 in the second term of this equation%2C so the final formula is correct%3F%0D%0A%0D%0AThanks%2C%0D%0ABryan%0D%0A%0D%0Ahttp%3A%2F%2Fwww.cut-the-knot.org%2Fwiki-math%2Findex.php%3Fn%3DMathematics.Tartaglia-CardanoDerivation%0D%0A%0D%0A
1|1|0|||||RE%3A Error in cubic formula|alexb||11:34:55|08/23/2009|Many thanks for being on alert.%0D%0A%0D%0AIam on vacation right now. Will fix the misprint when back home.