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
设其边长为m,m平方+132=(m+2(m-5))的平方,就是要求的面积+给出的面积等于最大的正方形的面积,最后将一元二次方程用韦达公式算出x=-0.5(舍)或x=8,面积就是8*8=64
width of the patio is 5 meters greater than the width of the walkway,是patio比walkway的边长大5,所以patio的边长应该是x+5,你的(m+2(m-5))的平方是什么?
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