Mathematics for IGCSE & O level - Equations (Section 2 - No. 35)

How should you handle the case when a quadratic equation's discriminant is zero?

Use the quadratic formula with the '±' part.

Set up two different solutions.

The equation does not have real solutions.

Only one real solution, a repeated root.

If the discriminant is zero, the square root of zero is zero, leading to only one real solution.