rectangular area = width * length = 238 ft²
width = length - 3
consider length = x
width = x -3
238 = x *(x-3)
238 = x²-3x
x²-3x-238=0
(x-17)(x+14)
x = - 14 we dont use it because dimensions cant be negative
x = 17
length = 17 ft
width = 14 ft
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