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JOIN AMONG USSS CODE FHUTDB
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The original area of a face would be a^2. Now that you added b to the edge, the new area of each face would be (a+b)^2. To find how much the are increased, subtract a^2 from (a+b)^2. So the answer is b(2a+b)
Answer:
(9, -1)
Step-by-step explanation:
