Math
posted by Megan Bill .
The length of a rectangular field is 3 yards less than twice the width. If the area of the field is 104 squared yards, what are the dimensions of the field? The answer is W=8, L=13 How do you work it out to get the answer????

let the width be x
then length is 2x3
x(2x3) = 104
2x^2  3x  104 = 0
(2x+13)(x8) = 0
x = 13/2 or x = 8, but x has to be positive for width
x = 8
width is 8
length = 2(8)  3 = 13