We have

so this is indeed a difference of squares. Factorizing would give

making the answer D.
We can further factor the first term here and write

but that's clearly out of the scope of this question.
Answer:
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56
Step-by-step explanation:
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They would need to buy 5 dozens because the area is 56 and 12 times 5 is 60.
Answer:
8.14 is the answer
Step-by-step explanation: