Question

if x+y+z=10 and x^2+y^2+z^2=50 then x+y+z equals​

Answer 1

Answer:

x+y+z=10

It is already given in question , please recheck it

Answer 2

using the identity

(a + b + c)² = x² + y² + c² + 2(ab + bc + ca)

(x + y + z)² =  x² + y² + z² = 2(xy + yz + zx)

put the value of x , y , and z.

(10)² = 50 +  2(xy + yz + zx)

100/2 = 50 + xy + yz + zx

50 - 50 =   xy + yz + zx

xy + yz + zx = 0

answer is  = 0

may be it is helpful for you