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OpenStudy (anonymous):
The area of a rectangle is 60 square feet. Find its length and its width. The length is x+3 and the width is x-1
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OpenStudy (campbell_st):
well you have (x + 3)(x - 1) = 60 so distributing and rewriting the equation you have \[x^2 + 2x - 63 = 0\] solve the quadratic for x. only use the positive solution as a measurement can't be negative
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