Question

Simplify: (x + y)(x - y) + (y + z)(y - z) + (z + x)(z - x)​

Answer 1

Answer:

0

Step-by-step explanation:

Simplify: (x + y)(x - y) + (y + z)(y - z) + (z + x)(z - x)

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Answer 2

Answer:

Answer..

$\sf{ x( y - z ) + y ( 2 - x ) + z ( x - y )} \\ = xy - xz + yz - yx + zx -zy \\ =(xy-yx)+(-xz+zx)+ (yz-zy) \\ =0$