From: Walter Roberson on 29 Mar 2010 11:56 Mario Fatafehi wrote: > [x]=solve('5*x^3 +10*x^2-7*x+1=0') gives me very strange result. help? > > x = > > > 1/30*(-23300+60*i*2355^(1/2))^(1/3)+82/3/(-23300+60*i*2355^(1/2))^(1/3)-2/3 > -1/60*(-23300+60*i*2355^(1/2))^(1/3)-41/3/(-23300+60*i*2355^(1/2))^(1/3)-2/3+1/2*i*3^(1/2)*(1/30*(-23300+60*i*2355^(1/2))^(1/3)-82/3/(-23300+60*i*2355^(1/2))^(1/3)) > > -1/60*(-23300+60*i*2355^(1/2))^(1/3)-41/3/(-23300+60*i*2355^(1/2))^(1/3)-2/3-1/2*i*3^(1/2)*(1/30*(-23300+60*i*2355^(1/2))^(1/3)-82/3/(-23300+60*i*2355^(1/2))^(1/3)) simple(x) |