Question

if X + Y + Z is equal to zero and X square + Y square + b square is equal to 12 find the value of xy + yz + xz​

Answer 1

Answer:

-6

Step-by-step explanation:

(x+y+z)^2=x^2+y^2+z^2+2(xy+yz+zx)

0=12+2(xy+yz+zx)

(xy+yz+zx)=-6