fdg4827665517NotethatifK11K12K21K22thenthelinesareparallelThereisnouniquepointatwhichtheycrossandthereisnosolutionfdgK1fpgInotherwordsifK11K12K21K22thenthematrixKcannotbe ID: 180375
fdg=(4:82766:5517)Notethatif(K11=K12)=(K21=K22) thenthelinesareparallel.Thereisnouniquepointatwhichtheycross