Question

How can you tell when a quadratic equation has no real solutions

Answer 1

when graph lies all above or below axis

Answer 2

here are the possible ansewers when the radicand is negative
when the radicand equals zero
when b in the quadratic formula is greater than the radicand
when the radicand is not a perfect square

Answer 3

if by the radicand you mean 'b^2 - 4ac' then the first option is correct