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OpenStudy (anonymous):
The width of a rectangle is 7cm shorter than its length and its area is 228 sq. cm. Find the dimensions f the rectangle.
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OpenStudy (anonymous):
x(x-7) =228 ==> x^2-7x-228 =0 ===> (x+12)(x-19)=0 ===> x=-12 or x=19 ===> dimentions are 19 and (19-7 =12)
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