Question

If x = -3 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the

equation?
The discriminant is negative.
The discriminant is -3.
The discriminant is 0.
The discriminant is positive.

Answer 1

The discriminant is 0

Explanation:

If b² - 4ac = 0 then the roots are real and equal

Since there is only one x- intercept then this condition applies