Answer:
(6x^2) + (6x + 1)
Explanation:
We know perimeter is the sum of all sides of an object, so in this case, we can write it like this:
3x + 1 +3x + 1 + 3x^2 + 3x^2
Now we simplify:
2(3x+1) + 2(3x^2)
2(3x^2+3x+1)
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