Question

If the equation -x^2 + 2(k+2)x - 9k = 0 has two imaginary roots, what are the values of k ?

Answer 1

for imaginary roots you should have
b^2-4ac < 0
(2(k+2))^2 - 4 (-1) (-9k) < 0

Answer 2

.......oohh thanks :)