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题库 / GMATLA-PS-10
The figure shows a square patio surrounded by a walkway of width x meters. If the area of the walkway is 132 square meters and the width of the patio is 5 meters greater than the width of the walkway, what is the area of the patio, in square meters?
56
64
68
81
100
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因为图为正方形，先用开根号方式排除A C，再用代入法带入公式8x^2+20x=132算出值
不能排除吧？题目没说x是整数？
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