# If x=y=z, then (x+y+z)²/(x²+y²+z²) is

**Answer: (1) 3**

**Explanation:-**

**Given-
**x = y = z

Then, (x + y + z)²/(x² + y² + z²)

(x + x + x)²/(x² + x² + x²) (x = y = z Given in the question)

= (3 x)²/3 x²

= 9 x² = 3 x²

= 3

Then, the value of (x + y + z)²/(x² + y² + z²) is 3.

Hence, the answer is (1) 3.