Error: 4wemayassumethatthereisnox3term.thischangedoesnotalterthegaloisgroupandthediscriminant.soletf(x)=x4 Bx2 Cx D2f[x]beanirreduciblepolynomialwithrootsr1;r2;r3;r4inasplitting Eldeoff(x)overf:wewritegfs4: - PowerPoint Presentations and PDF Documents