## anonymous 5 years ago What is the possible discriminant of the graph? a. –11 b. 0 c. 18 d. 36

1. anonymous

2. anonymous

i think its d, 36. Am i right?

3. anonymous

A graph does not have discriminant. We call discriminant to this: $\sqrt{b^2-4ac}$

4. anonymous

yea but dont u have to figure it out somehow?

5. anonymous

this is what i did, hold on

6. anonymous

That graph represents a quadratic function which roots depends on the value of the determinant.

7. anonymous

x = -4 and x = 2 So, (x - 4) (x + 2) = 0 -4 * 2 = - 8 and - 4 + 2 = -2 y = x^2 - 2x - 8 b^2 - 4ac (-2)^2 - 4(1)(-8) 4 + 32 =36 Discriminate, SO you have to work backwards, am i right?

8. anonymous

As you can see there are two different roots, and there are real numbers. So the value of the discriminant must be positive.

9. anonymous

Exactly, you''re right!

10. anonymous

so d?

11. Mertsj

yes d