Question

The width of a field is 3 miles less than the length. The square mileage of the plot is 18 miles squared. Find the dimensions.

Answer 1

LW = A
L(L - 3) = 18
L^2 - 3L - 18 = 0
(L - 6) (L + 3) = 0
L could be 6 or -3 ( -3 cannot be a length of a side of a rectangle since it’s negative.)
So L = 6 and W= 3