Question

A quadratic equation has exactly one real number solution. Which is the value of its discriminant?

Answer 1

When your quadratic equation has exactly one real solution the value of the discriminant is D>0

Answer 2

A quadratic equation has exactly one real number solution.

For any quadratic equation the discriminant D is $b^2 - 4ac$

When discriminant D> 0 then there will be 2 real solutions

When discriminant D= 0 then there will be 1 real solution

When discriminant D< 0 then there will be 2 complex solutions

Question says 'A quadratic equation has exactly one real number solution'

So Discriminant D =0