1.

{(x – y)(x + y) + (y – z)(y + z) + (z + x)(z – x)}​

Answer»

ong>Answer:

0

Step-by-step EXPLANATION:

= {(X – y)(x + y) + (y – Z)(y + z) + (z + x)(z – x)}

= {(x^2 - y^2) + (y^2 - z^2) + (z^2 - x^2)}

= {x^2 - y^2 + y^2 - z^2 + z^2 - x^2}

= 0


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