Mathematics for IGCSE & O level - Equations (Section 6 - No. 33)

What does it mean if the discriminant (b² - 4ac) of a quadratic equation is equal to zero?

There are two distinct real roots.

There is one real root (a repeated root).

There are no real roots.

There are two complex roots.

A discriminant of zero signifies that the quadratic equation has one repeated real root.