The are of the rectangular garden is 14 sq, ft.
The area of a rectangle is:
A = lw
where l= length; w = width (this is given as w as well)
If the length is 3 ft. longer than the width then:
l = w + 3
Substituting:
14 = (w + 3)w
w2 + 3w - 14 = 0
But the +/- value must be positive, so: