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Mathematics, 05.03.2021 07:10 es17118

For Mother's Day, Bob made a pop-up card for his mom. He started with a large paper rectangle. Then, Bob cut out a square with an area of 81 square inches from the middle of the large rectangle. The area of the piece Bob had left was 129 square inches. Let r represent the area of the rectangle that Bob started with. Which equation models the problem?

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For Mother's Day, Bob made a pop-up card for his mom. He started with a large paper rectangle. Then,...
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