Reply To: Chemistry/Biology/Physics/Biochemistry/Math Home › Forums › Decaffeinated Coffee › Chemistry/Biology/Physics/Biochemistry/Math › Reply To: Chemistry/Biology/Physics/Biochemistry/Math January 1, 2012 4:14 pm at 4:14 pm #841605 OneOfManyParticipant The square of any real number is positive. You were referring to i, no?