Question 231447
As examples, the expression x^2 -4x+4 has zeros (muliplicity 2) at x=2.  The expression x^2 +4 has imaginary numbers for its zeros. 


In general, the polynomial expression ax^2 +bx +c has multiply roots if {{{b^2-4ac=0}}}.  It has imaginary roots if {{{b^2 -4ac<0}}}.


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus