Question

If x=6 is the only x intercept of the graph of a quadratic equation which statement best descibes the discriminant of the equation The discriminant is 0.

The discriminant is 6.
The discriminant is positive.
The discriminant is negative.

Answer 1

The correct answer would be:

Answer: the discriminant is 0.

Because we have only one solution:
Then, the discriminant (b²-4ac) have to be equal to 0.
ax²+bx+c=0

x=[-b⁺₋√(b²-4ac)]/2a=(-b⁺₋0)/2a=-b/2a (this is only one solution)