Came across this problem on a math competition.
The equation has two imaginary roots. Which of the following is a true statement about the value of ?
a)
b)
c)
d)
I'm having a hard time setting up a condition for k.
Whereas you are absolutely correct, I was part of the mathematics contest community long enough to know many in the mathematics education community use imaginary number and complex number interchangeably. I assure you it is futile to even try to correct them. Thus having seen that this is an old contest question, I assumed the worst.