Question

If x + y + z = 0, then x2 + y2 + z2 is​

Answer 1

Answer:

-2(xy + yz + xz)

Step-by-step explanation:

x + y + z = 0

So x² + y² + z²

  = (x + y + z)² - 2(xy + yz + xz)

  = 0² - 2(xy + yz + xz)

  = -2(xy + yz + xz)

Ans:- -2(xy + yz + xz)