If x + y = 11 and xy = 24, then x² + y² is equal to

1. 121

2. 73

3. 48

4. 169

We know that,

x² + y² = (x + y)² - 2xy.

Substituting values we get,

x² + y² = (11)² - 2 × 24 = 121 - 48 = 73.

Hence, Option 2 is the correct option.