Answer:
Given that: ![\frac{x-y}{x+y} - \frac{x+y}{x-y}](https://tex.z-dn.net/?f=%5Cfrac%7Bx-y%7D%7Bx%2By%7D%20-%20%5Cfrac%7Bx%2By%7D%7Bx-y%7D)
Take LCM of x+y and x-y is, ![x^2-y^2](https://tex.z-dn.net/?f=x%5E2-y%5E2)
then;
![\frac{(x-y)^2 -(x+y)^2}{x^2-y^2}](https://tex.z-dn.net/?f=%5Cfrac%7B%28x-y%29%5E2%20-%28x%2By%29%5E2%7D%7Bx%5E2-y%5E2%7D)
Using the identities rule:
![(a+b)^2 = a^2+2ab+b^2](https://tex.z-dn.net/?f=%28a%2Bb%29%5E2%20%3D%20a%5E2%2B2ab%2Bb%5E2)
![\frac{(x^2-2xy+y^2)-(x^2+2xy+y^2)}{x^2-y^2} = \frac{x^2-2xy+y^2-x^2-2xy-y^2}{x^2-y^2}](https://tex.z-dn.net/?f=%5Cfrac%7B%28x%5E2-2xy%2By%5E2%29-%28x%5E2%2B2xy%2By%5E2%29%7D%7Bx%5E2-y%5E2%7D%20%3D%20%5Cfrac%7Bx%5E2-2xy%2By%5E2-x%5E2-2xy-y%5E2%7D%7Bx%5E2-y%5E2%7D)
Combine like terms;
![\frac{-4xy}{x^2-y^2}](https://tex.z-dn.net/?f=%5Cfrac%7B-4xy%7D%7Bx%5E2-y%5E2%7D)
Therefore, the answer is, ![\frac{-4xy}{x^2-y^2}](https://tex.z-dn.net/?f=%5Cfrac%7B-4xy%7D%7Bx%5E2-y%5E2%7D)
There’s the answer in terms of PI, if they don’t want it in terms on PI then just multiply 1500 by PI
The answer to ur question is (D.4)