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Answer:
61
Explanation:
Subtract 5 from the 12 ( as 5 is smaller), then multiply 8 x 5. Then multiply the remaining number from 12 (7) by 3. Then add the 2 sums together.
This can be broken down into a square and a rectangle.
A=5(5)+(12)(8-5)
A=25+12(3)
A=25+36
A=61 u^2
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