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Answered by
1
Answer:
0
Step-by-step explanation:
(x - y)(x + y) + (y - z)(y + z) + (z - x)(z + x)
= x² + xy - xy - y² + y² + yz - yz - z² + z² + xz - xz - x²
= x² - x² - y² + y² - z² + z² + xy - xy + yz - yz + xz - xz
= 0
Answered by
1
Answer:
0
Step-by-step explanation:
(x² - y²) + (y² - z²) + (z² - x²)
= 0
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