Question

(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+X) is equal to
a).0
b).x²+y²+z²
c).xy+yz+zx
d).x+y+z

please answer this question ASAP................​

Answer 1

Answer:

(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+X) is equal to 0

Answer 2

Answer:

b is the answer bro it's very easy