SOLUTION: This is confusing me...can someone explain this to me? FIND A VALUE FOR k SO THAT 9m^2 - kn^2 WILL HAVE THE FACTORS 3m + 7n AND 3m -7n

Algebra.Com
Eval error:

ModPerl::Util::exit: (120000) exit was called at /home/ichudov/project_locations/algebra.com/templates/Algebra/Questions/MoreLikeThis.pm line 159