If the discriminant of a specific quadratic equation is -1, which of the following solutions is possible?

Question

A. 3 – 2i, 3 + 2i
B. 2, 2
C. 0
D. -1, -1
E. 1, -2

Answer 1

In the formula for the roots (-b +/- sqrt(b^2 - 4ac)) / 2a, the discriminant is b^2 - 4ac.

So the roots in this question must include i (sqrt of -1). Clearly this rules out answers B, C and D.

Answer A is valid for suitable values of a, b and c.

Answer 2

A)