Re: Possibly related to my post "Unexpected Graph Output"...

*To*: mathgroup at smc.vnet.net*Subject*: [mg125494] Re: Possibly related to my post "Unexpected Graph Output"...*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Thu, 15 Mar 2012 00:35:09 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

On 3/14/12 at 12:41 AM, jwkochanski at mymail.vcu.edu (James Kochanski) wrote: >Why does Mathematica think the cube root of -27 is 1.5 + 2.598076 I >and not -3? Because Mathematica uses complex variables and the value returned is a complex cube root of -27. That is: In[8]:= NSolve[x^3 == -27, x] Out[8]= {{x->-3.},{x->1.5 -2.59808 I},{x->1.5 +2.59808 I}}