Domain: (-∞, ∞) or {X, where x ∈ R}
Range: (-∞, ∞) or {Y, where y ∈ R}
This is a difference of squares. Every time you have the difference between two squares, you can factor it as the product between the sum and the difference of the roots:

In your case, the squares are


So, the difference between the squares,
can be written as the multiplication between the sum and difference of the roots:

Answer:
-2/5
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given: u and v be are the solutions of
Let
is the quadratic equation and u and v are the zeroes/solutions then
Sum of zeroes; 
Product of zeroes; 
Comparing
to
we get a= 3 , b= 5 and c = 7


Now we have to find
adding and subtracting 2uv in numerator we get

Substituting the values from (i) and (ii) we get

Hence, the value of
is 
D. Although I'm not 100% sure