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Mathematics 15 Online
OpenStudy (anonymous):

The area of a rectangular envelope is given by the trinomial x^2+8x+7 . The length of the envelope is x+7 . What is the width of the envelope?

OpenStudy (tyteen4a03):

Since a rectangle's area can be found by multiplying its length to its width, simply divide x^2+8x+7 by x+7.

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