Answer:
+ 3 represents the length of the rectangle..
Step-by-step explanation:
I can give you an answer
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Area = L * W
(x^2- 6x - 7) = L * (x - 7)
(x - 7)(x + 1) = L * (x - 7)
(x - 7)(x + 1)
========= = L
(x - 7)
(x + 1) = L
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