Answer:
12x²+ 28
Explanation:
Since to find the perimeter we need to add all the side lengths together. That would give us, 12x²+ 28.
6x^2 + 8x + 28
2 times the length plus 2 times the width gives the perimeter
2(3x^2 + 3x + 6) + 2(x + 8)
6x^2 + 6x + 12 + 2x + 16
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