Re: Bug in Solve?
- To: mathgroup at smc.vnet.net
- Subject: [mg102959] Re: Bug in Solve?
- From: Ben Dundee <dundee at mps.ohio-state.edu>
- Date: Thu, 3 Sep 2009 05:39:07 -0400 (EDT)
Sorry for the double post.
Try evaluating the following:
f[x_] := x^3 - 15 x + 2
Plot[f[x], {x, -5, 5}]
NSolve[f[x] == 0, x]
Solve[f[x] == 0, x]
FullSimplify[ComplexExpand[%]]
You should see that the imaginary parts manifestly cancel in the final answer.