Question

4.

For which discriminant is the graph possible?

A. b2 – 4ac = 0
B. b2 – 4ac = 6
C. b2 – 4ac = –2

Answer 1

A. b2 – 4ac = 0

Explanation:

Hey user☺☺

Option a is correct

Because the graph has only one solution.

As the graph touches the x-axis at one point that means that it will have only one solution for x. But we know that a quadratic equation has two solutions. So the graph will have two equal solution and therefore the discriminant will be 0.

Hope this will help☺☺