(x/y)+(y/x) = 3 হলে, (x²/y²)+(y²/x²) এর মান কত?

A 6

B 7

C 9

D 10

Correct Answer: Option B

(x/y)+(y/x) = 3

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

= 3² - 2 = 9 - 2 = 7