Ok I think it means that the length \(l\) of the rectangle is 2 m more than is width \(w\)...
The area is A=\(l*w=(w+2)*w=80\)
so: \(w^{2} +2w-80=0\)
Solving this equation (using the quadratic formula) you get 2 solutons. The only acceptable is the positive one, i.e. \(w=8 m\), the length will then be \(l=w+2=8+2=10m\).
