Answer:
L = b + 2.
W = 7b
Step-by-step explanation:
Factoring 7b^2 and 14b, we get 7b(b + 2). The greatest common monomial factor here is 7b. This is the width of the rectangle in question.
The area of the rectangle is 7b^2+14b.
Obtain the length of the rectangle by dividing 7b^2+14b by 7b:
L = b + 2.
W = 7b