Question

ANSWER WITHOUT SPAMMIMNG

Answer 1

Answer:

the answer will be 0

Step-by-step explanation:

as in

x2 =x *x

y2=y*y

z2 =z*z

so after that 6 in total

then another term is also 6 in total

and all factors are in pair of 2 in the both

so it will be 0

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Answer 2

Answer:

2 ( x2 + y2  + z2 - xy - yz - zx  )

⇒2 x2 + 2y2  + 2z2 - 2xy - 2yz - 2zx  

⇒ x2 + x2 +  y2  + y2  +  z2 + z2 - 2xy - 2yz - 2zx  

⇒ x2 +  y2  - 2xy  + y2  +  z2 - 2yz + z2 +  x2 - 2zx  

⇒ ( x - y )2 +  ( y - z )2 + ( z - x )2

GE sis ;)

O.. Ok.

TC..