Mathematics
OpenStudy (anonymous):

What is the possible discriminant of the graph? a. –11 b. 0 c. 18 d. 36

OpenStudy (anonymous):

OpenStudy (anonymous):

i think its d, 36. Am i right?

OpenStudy (anonymous):

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

OpenStudy (anonymous):

yea but dont u have to figure it out somehow?

OpenStudy (anonymous):

this is what i did, hold on

OpenStudy (anonymous):

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

OpenStudy (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?

OpenStudy (anonymous):

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

OpenStudy (anonymous):

Exactly, you''re right!

OpenStudy (anonymous):

so d?

OpenStudy (mertsj):

yes d