Question

solve the following using identities (x/y -y/x)^2

Answer 1

Answer:

x²/y² + y²/x² - 2

Step-by-step explanation:

We know that, (a-b)² = a² + b² - 2ab .

( x/y - y/x )² = x²/y² + y²/x² - (2 × x/y × y/x)

                  = x²/y² + y²/x² - 2

Answer 2

(x/y)^2 - 2(x/y×y/x)+(y/x)^2

2x/2y^2 - 2x/y ×2y/x +2y/2x^2

2x/y^2 -4xy/xy + 2y/2x^2

2x/2y^2-4+2y/2x^2