If the area of a square field is x^2 + y^2 + z^2 + 2xy – 2yz – 2zx sq. units, then its perimeter is
If the area of a square field is x2 + y2 + z2 + 2xy – 2yz – 2zx sq. units, then its perimeter is
A) (x + y + z)2
B) 4 (x + y + z)
C) 4 (x + y – z)
D) (x + y – z)2
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