Question

How to tell if a complex solution is real or imaginary?

Answer 1

If a parabola has a descrimant is less than zero its solution is imaginary, if it is equal to 0 it has one solution and if it is greater than 0 it has 2 solutions. The discramanant can be written as b^2 - 4ac and it is the area under the square root in the quadratic equation.

Explanation:

Answer 2

The expression b2 − 4ac is called the discriminant, and can be used to determine whether the solutions are real, repeated, or complex: 1) If the discriminant is less than zero, the equation has two complex solution(s). 2) If the discriminant is equal to zero, the equation has one repeated real solution(s).