The width of a rectangle is 3ft less than the lenght. The area is 4ft^2. Find the lenght and the width
ahh, you fixed it, but surely you should have been able to do this easy question.
length -- x
width -- x-3
x(x-3) = 4
x^2 - 3x - 4 = 0
(x-4)(x+1) = 0
x = 4, or x = -1, the last part is a silly answer
length = 4
width = 1