Adding polynomials, whine one is correct?

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Answer:
P = 48xy + 4 units.
Step-by-step explanation:
To find the perimeter of a square, the formula P = 4s (where 's' is the side-length):
Substitute in 12xy + 1 for s:
P = 4(12xy + 1)
Distribute the 4:
P = 4(12xy) + 4(1)
P = 48xy + 4 units.