Question

prove that(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+x)=0​

Answer 1

Hope you understand this and it helps you

Answer 2

Answer:

To proof -

(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+x)=0

x² - y² + y² - z² + z² - x² = 0

0 = 0

Hence Proved

(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+x)=0