Question

if x =1,y=2 and z=3 then(x²+y²+z²)=?

a) 6 b)12 c)14 d)15​

Answer 1

$\huge\sf\underbrace\red{Solution}$

Given,

x = 1

y = 2

z = 3

x² + y² + z² = (1)² + (2)² + (3)²

1 + 4 + 9

14

x² + y² + z² = 14

Answer 2

1. (1)2=1
2. (2)2=4
3. (3)2=9

(x2+y2+z2)=14

c) 14 is the answer