(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+x) is equal to - Vidyadip

MCQ

$(x-y)(x+y)+(y-z)(y+z)+(z-x)(z+x)$ is equal to

✓
$0$
B
$x y+y z+z x$
C
$x+y+z$
D
$x^2+y^2+z^2$

✓

Answer

Correct option: A.

$0$

A

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