The solutions of a quadratic equation can be classified as follows.
If the discriminant is
1. positive, then the quadratic equation has two distinct real solutions and and its graph has two x - intercepts.
\2. zero, then the quadratic equation has one repeated real solution and its graph has one x - intercept.
\3. negative, then the quadratic equation has no real solutions and its graph has no x - intercepts.
\The quadratic equation is .
The general form of the quadratic equation is .
The discriminant formula is .
Consider .
Compare it with general form.
\.
Substitute the values of in
.
.
Since the discriminant is zero, the quadratic equation has one repeated solution and its graph has one x - intercept.
The quadratic equation has one repeated solution.