Question 133786
Let w=width
Then length=2w+5

Area of a rectangle =L*W, so:
w(2w+5)=52    (w(2w+5)=L*W and we are told that this equals 52 sq in. OK)

2w^2+5w=52  subtract 52 from each side

2w^2+5w-52=0  quadratic in standard form

It's now set up ready to be solved --you can use the quadratic formula

You will come out with a positive and a negative value for w--neglect the negative value ---lengths and widths in this problem are positive



Hope this helps--ptaylor