Question 133127
Length = Width + 2
Area = 1200
Area = Length + Width 

Let W be the width. Then length L = (W +2)

{{{A = L * W}}}
{{{A = (W+2) * W}}}
{{{A = W^2 + 2W}}}
{{{1200 = W^2 + 2W}}}
{{{0 = W^2 +2W -1200}}}

Now use the quadractic equation to solve
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 

I get 33.65 and 35.65