Answer:
B)
Step-by-step explanation:
You must divide these fractions with square roots:

/ 6
=
=
= 
Answer:
y=0
Step-by-step explanation:
That's what I got from doing the equation
The discriminant is the bit under the radical, the
.
Because it's under a radical, it's what tells you how many and what kind of solutions you have (two real, one real, or two imaginary/complex solutions).
Does that answer your question? Or do you need an example?
Suppose you had the equation
, then you'd have:
,
and 
You'd plug those values into
to see if the discriminant was positive, zero, or negative:

Since that is 37 (a postiive number), you'd have two real solutions.
(5, -2) best represents y